People_

Dr Jessica Rickard

BAnVetBioSc (Hons) PhD

McCaughey Senior Lecturer in Livestock Production
School of Life and Environmental Sciences

Phone

+61 2 9351 8564

Email

jessica.rickard@sydney.edu.au

Address

C02F - Centre for Carbon, Water and Food

The University of Sydney

Details

Member of Sydney Institute of Agriculture

Websites

Twitter

Linked In

Animal Reproduction Group

Biographical details

Following the completion of her PhD in 2014, Dr Rickard undertook a number of post-doctoral research positions at the University of Sydney. She has worked on a wide variety of projects related to applied artificial reproductive technologies in sheep such as; the commercialisation of sexed ram semen, the effect of heat stress on the Merino ewe, the use of transrectal ultrasound to assess early embryo loss, the role of Melatonin in advancing the ram breeding season, the use of on-animal sensors to assess ram mating behaviour and factors affecting the survival of liquid stored ram spermatozoa. She is currently the McCaughey Senior Research Fellow at the University of Sydney and is leading a research program investigating factors affecting the success of artificial insemination within the Australian sheep industry. She is also continuing the work of her PhD, which focused on the role of ram seminal plasma, using a combined transcriptomic and proteomic approach to identify molecular sperm traits responsible for improved sperm survival and fertility in the ovine cervix.

Research interests

Applied reproduction in domestic and wild animals
Semen preservation and artificial insemination
The role of seminal plasma in sperm function and fertility
Production of pre-sexed offspring by flow cytometric sex-sorting and its dissemination throughout the sheep industry
Optimisation of oestrus synchrony to improve fertility rates following artificial insemination
Detection and prevention of embryo loss in sheep
Applying technology to the Australian sheep industry for improved reproductive management

Teaching and supervision

Honours and postgraduate research supervision relating to the projects listed below
Casual teaching and demonstrating in Reproductive biology, reproductive physiology and applied reproduction in units of study within the BScVet (VETS2016; VETS4233; VETS5360) and BAnVetBioSc (ANSC3102; ANSC3104) degrees.

Current projects

A proteomic comparison of fresh and frozen-thawed ram sperm to identify potential proteins involved in sperm-cervix interactions
The development of a new ultrasound technique to detect and prevent early pregnancy loss in sheep
The fertility of sexed ram semen
The influence of Melatonin on the success of ram sperm cryopreservation
The collection and analysis of large scale fertilty data within the Australian sheep industry to identify trends in the success of artificial breeding programs
The application of technology to the sheep industry for improved reproductive management

Associations

International Congress on Animal Reproduction (ICAR)
Association for Applied Animal Andrology (AAAA)
Society of Reproductive Biology (SRB)

Themes

Animal production and welfare, Wildlife and conservation

International links

France

(Institut National de la Recherche Agronomique (INRA)) Collaboration with Dr Xavier Druart on interaction between sperm, seminal plasma and the female reproductive tract in sheep.

Germany

(Leibniz Institute for Zoo and Wildlife Research) Collaboration with Dr Robert Hermes on basic and applied rhino reproduction.

Current research students

Project title	Research student
Studies on the assessment of ram sperm morphology	Katherine SEYMOUR
Effect of seminal plasma on the motility and metabolism of ram spermatozoa	Madeleine VAN DE HOEK

Publications

By Type

Expand all

Journals

de Graaf, S., Golledge, M., Rickard, J., Refshuage, G. (2024). An analysis of fertility and fecundity in the Australian sheep flock between 2006 and 2019. Scientific Reports, 14(17781), 1-11. [More Information]
Spanner, E., de Graaf, S., Rickard, J. (2024). Factors affecting the success of laparoscopic artificial insemination in sheep. Animal Reproduction Science, 264.
Crean, A., Pulpitel, T., Pini, T., Rickard, J., de Graaf, S., Senior, A., Simpson, S., Wali, J. (2024). Low-Fat, High-Carbohydrate Diets Reduce Body Weight and Sperm Count but Increase Sperm Motility in Mice. The Journal of Nutrition, 154(1), 60-68. [More Information]
J Robertson, M., Chambers, C., Spanner, E., de Graaf, S., Rickard, J. (2024). The Assessment of Sperm DNA Integrity: Implications for Assisted Reproductive Technology Fertility Outcomes across Livestock Species. Biology, 13(7). [More Information]
Spanner, E., de Graaf, S., Rickard, J. (2024). Uterine tone influences fertility of Merino ewes following laparoscopic artificial insemination. Theriogenology, 222, 45-53.
Spanner, E., Rickard, J., de Graaf, S., Wilson, H., McMahon, J. (2023). Fertility of ram semen frozen in pellets or straws. Animal - Science Proceedings, 14(3), 431-548. [More Information]
Warr, S., Pini, T., de Graaf, S., Rickard, J. (2023). Molecular insights to the sperm–cervix interaction and the consequences for cryopreserved sperm. Biology Of Reproduction, 108(2), 183-196. [More Information]
Santolaria, P., Rickard, J., Perez-Pe, R. (2023). Understanding Sperm Quality for Improved Reproductive Performance. Biology, 12(7). [More Information]
Hermes, R., Lecu, A., Potier, R., Rickard, J., Bohner, J., Wedlarski, R., Hruby, J., Hildebrandt, T. (2022). Cryopreservation of Giraffe Epidydimal Spermatozoa Using Different Extenders and Cryoprotectants. Animals, 12(7), 1-10. [More Information]
Rizkallah, N., Chambers, C., de Graaf, S., Rickard, J. (2022). Factors Affecting the Survival of Ram Spermatozoa during Liquid Storage and Options for Improvement. Animals, 12(3), 244. [More Information]
Rickard, J., Pool, K., de Graaf, S., Portas, T., Rourke, N., Wiesner, M., Hildebrandt, T., Goritz, F., Hermes, R. (2022). Increasing the Yield and Cryosurvival of Spermatozoa from Rhinoceros Ejaculates Using the Enzyme Papain. Biology, 11(2), 154. [More Information]
Van de Hoek, M., Rickard, J., de Graaf, S. (2022). Motility Assessment of Ram Spermatozoa. Biology, 11(1715). [More Information]
Tumeth, E., Rickard, J., Mercorelli, L., Gonzalez, L., de Graaf, S. (2022). The use of accelerometers for the remote detection of mounting in rams and testosterone-treated wethers. Computers and Electronics in Agriculture, 199, 107129. [More Information]
Pool, K., Rickard, J., de Graaf, S. (2021). Melatonin improves the motility and DNA integrity of frozen-thawed ram spermatozoa likely via suppression of mitochondrial superoxide production. Domestic Animal Endocrinology, 74, 1-8. [More Information]
Pool, K., Rickard, J., Pini, T., de Graaf, S. (2020). Exogenous melatonin advances the ram breeding season and increases testicular function. Scientific Reports, 10(1), 9711. [More Information]
Green, C., Rickard, J., de Graaf, S., Crean, A. (2020). From One Ejaculate to Another: Transference of Sperm Traits via Seminal Plasma Supplementation in the Ram. Biology, 9(2), 1-9. [More Information]
Pool, K., Rickard, J., de Graaf, S. (2020). Global Methylation and Protamine Deficiency in Ram Spermatozoa Correlate with Sperm Production and Quality but Are Not Influenced by Melatonin or Season. Animals, 10, 2302. [More Information]
Pool, K., Rickard, J., de Graaf, S. (2020). Overcoming neuroendocrine and metabolic barriers to puberty: the role of melatonin in advancing puberty in ewe lambs. Domestic Animal Endocrinology, 72, 1-10. [More Information]
Leahy, T., Rickard, J., Pini, T., Gadella, B., de Graaf, S. (2020). Quantitative Proteomic Analysis of Seminal Plasma, Sperm Membrane Proteins, and Seminal Extracellular Vesicles Suggests Vesicular Mechanisms Aid in the Removal and Addition of Proteins to the Ram Sperm Membrane. Proteomics, 20(12), 1900289. [More Information]
Rickard, J., de Graaf, S. (2020). Sperm surface changes and their consequences for sperm transit through the female reproductive tract. Theriogenology, 150, 96-105. [More Information]
Pool, K., Rickard, J., Tumeth, E., de Graaf, S. (2020). Treatment of rams with melatonin implants in the non-breeding season improves post-thaw sperm progressive motility and DNA integrity. Animal Reproduction Science, 221, 106579. [More Information]
Al-Bulushi, S., Manjunatha, B., Bathgate, R., Rickard, J., de Graaf, S. (2019). Artificial insemination with fresh, liquid stored and frozen thawed semen in dromedary camels. PloS One, 14(11), 1-14. [More Information]
Al-Bulushi, S., Manjunatha, B., Bathgate, R., Rickard, J., de Graaf, S. (2019). Liquid storage of dromedary camel semen in different extenders. Animal Reproduction Science, 207, 95-106. [More Information]
Leahy, T., Rickard, J., Bernecic, N., Druart, X., de Graaf, S. (2019). Ram seminal plasma and its functional proteomic assessment. Reproduction, 157(6), R243-R256. [More Information]
Al-Bulushi, S., Manjunatha, B., de Graaf, S., Rickard, J. (2019). Reproductive seasonality of male dromedary camels. Animal Reproduction Science, 202, 10-20. [More Information]
Druart, X., Rickard, J., Tsikis, G., de Graaf, S. (2019). Seminal plasma proteins as markers of sperm fertility. Theriogenology, 137, 30-35. [More Information]
Rickard, J., Pool, K., Druart, X., de Graaf, S. (2019). The fate of spermatozoa in the female reproductive tract: A comparative review. Theriogenology, 137, 104-112. [More Information]
Pini, T., Rickard, J., Leahy, T., Crossett, B., Druart, X., de Graaf, S. (2018). Cryopreservation and egg yolk medium alter the proteome of ram spermatozoa. Journal of Proteomics, 181, 73-82. [More Information]
Al-Bulushi, S., Manjunatha, B., Bathgate, R., Rickard, J., de Graaf, S. (2018). Effect of semen collection frequency on the semen characteristics of dromedary camels. Animal Reproduction Science, 197, 145-153. [More Information]
Pool, K., Rickard, J., Leahy, T., Pini, T., de Graaf, S. (2018). Treatment of rams with melatonin in the non-breeding season improves the post-thaw quality of spermatozoa. Animal Reproduction Science, 194, e17-e17. [More Information]
Maddison, J., Rickard, J., Bernecic, N., Tsikis, G., Soleilhavoup, C., Labas, V., Combes-Soia, L., Harichaux, G., Druart, X., Leahy, T., de Graaf, S. (2017). Oestrus synchronisation and superovulation alter the cervicovaginal mucus proteome of the ewe. Journal of Proteomics, 155, 1-10. [More Information]
Rickard, J., Ryan, G., Hall, E., de Graaf, S., Hermes, R. (2017). Using transrectal ultrasound to examine the effect of exogenous progesterone on early embryonic loss in sheep. PloS One, 12(8), 1-18. [More Information]
Leahy, T., Rickard, J., Aitken, J., de Graaf, S. (2016). D-penicillamine prevents ram sperm agglutination by reducing the disulphide bonds of a copper-binding sperm protein. Reproduction, 151(5), 491-500. [More Information]
Rickard, J., Leahy, T., Druart, X., de Graaf, S. (2016). Exposure to seminal plasma reduces the duration that epididymal ram spermatozoa exhibit wave motion. Animal Reproduction Science, 169, 118-118. [More Information]
Maddison, J., Rickard, J., Mooney, E., Bernecic, N., Soleilhavoup, C., Tsikis, G., Druart, X., Leahy, T., de Graaf, S. (2016). Oestrus synchronisation and superovulation alter the production and biochemical constituents of ovine cervicovaginal mucus. Animal Reproduction Science, 172, 114-122. [More Information]
Leahy, T., Rickard, J., de Graaf, S. (2016). Penicillamine attenuates agglutination of ram spermatozoa in capacitating media through the reduction of disulphide bonds on a sperm binding protein. Animal Reproduction Science, 169, 95-95. [More Information]
Leahy, T., Rickard, J., Aitken, J., de Graaf, S. (2016). Penicillamine prevents ram sperm agglutination in media that support capacitation. Reproduction, 151(2), 167-177. [More Information]
Pini, T., Leahy, T., Soleilhavoup, C., Tsikis, G., Labas, V., Combes-Soia, L., Harichaux, G., Rickard, J., Druart, X., de Graaf, S. (2016). Proteomic Investigation of Ram Spermatozoa and the Proteins Conferred by Seminal Plasma. Journal of Proteome Research, 15(10), 3700-3711. [More Information]
Rickard, J., Schmidt, R., Maddison, J., Bathgate, R., Lynch, G., Druart, X., de Graaf, S. (2016). Variation in seminal plasma alters the ability of ram spermatozoa to survive cryopreservation. Reproduction, Fertility and Development, 28(4), 516-523. [More Information]
Rickard, J., Leahy, T., Soleilhavoup, C., Tsikis, G., Labas, V., Harichaux, G., Lynch, G., Druart, X., de Graaf, S. (2015). The identification of proteomic markers of sperm freezing resilience in ram seminal plasma. Journal of Proteomics, 126, 303-311. [More Information]
Rickard, J., Pini, T., Soleilhavoup, C., Cognie, J., Bathgate, R., Lynch, G., Evans, G., Maxwell, W., Druart, X., de Graaf, S. (2014). Seminal plasma aids the survival and cervical transit of epididymal ram spermatozoa. Reproduction, 148, 469-478. [More Information]
de Graaf, S., Rickard, J., Maddison, J., Bathgate, R., Druart, X. (2013). Impaired transport of liquid and frozen stored spermatozoa through the cervix. Reproduction in Domestic Animals, 48(1), 63-63. [More Information]
Druart, X., Rickard, J., Mactier, S., Kohnke, P., Kershaw-Young, C., Bathgate, R., Gibb, Z., Crossett, B., Tsikis, G., Labas, V., Grupen, C., de Graaf, S., et al (2013). Proteomic characterization and cross species comparison of mammalian seminal plasma. Journal of Proteomics, 91, 13-22. [More Information]

show 40 more

Conferences

Rickard, J., Pini, T., Leahy, T., de Graaf, S. (2016). Species specific sorting protocol required for the production of high quality chill- and frozen-stored sex-sorted ram sperm. 18th International Congress on Animal Reproduction, N/A: N/A.
Maddison, J., Rickard, J., Bathgate, R., Druart, X., de Graaf, S. (2014). Changes to ovine cervical mucus induced by the oestrous cycle, oestrus synchronisation and superovulation. European Society for Reproduction in Domestic Animals, Italy: Reproduction in Domestic Animals.
de Graaf, S., Rickard, J., Pini, T., Maddison, J., Druart, X., Leahy, T. (2014). Emerging Roles of Seminal Plasma in Sperm Function. 9th Biennial Conference of the Association for Applied Animal Andrology, Newcastle: Association for Applied Animal Andrology.
Rickard, J., Maddison, J., Pini, T., Bathgate, R., Evans, G., Maxwell, W., Lynch, G., Druart, X., de Graaf, S. (2013). Exposure to seminal plasma aids the migration of epididymal ram spermatozoa through the cervix. The Annual Conference of the Australian Society for Reproductive Biology, Australia: Australian Society for Reproductive Biology.
de Graaf, S., Rickard, J., Maddison, J., Bathgate, R., Druart, X. (2013). Impaired transport of liquid and frozen stored spermatozoa through the cervix. European Society for Reproduction in Domestic Animals, Italy: Reproduction in Domestic Animals.
Rickard, J., Bathgate, R., Maddison, J., Schmidt, R., Lynch, G., Druart, X., de Graaf, S. (2013). The effect of seminal plasma from rams with varied freezing resilience on the cryosurvival of ram spermatozoa. European Society for Reproduction in Domestic Animals, Italy: Reproduction in Domestic Animals.
Rickard, J., Kohnke, P., Bathgate, R., Druart, X., Lynch, G., de Graaf, S. (2012). A preliminary assessment of the ram spermatozoa glycoproteome using 2DLC-MS/MS. International Congress on Animal Reproduction, Canada: Reproduction in Domestic Animals.
de Graaf, S., Grupen, C., Rickard, J., Bathgate, R., Mactier, S., Kohnke, B., Crossett, B., Maxwell, W., Christopherson, R., Druart, X. (2012). Identification of Membrane Glycoproteins of Ejaculated and Epididymal Boar Spermatozoa Using LC-MS/MS. The 2nd World Congress of Reproductive Biology, N/A: N/A.

show 5 more

By Year

Expand all

2024

de Graaf, S., Golledge, M., Rickard, J., Refshuage, G. (2024). An analysis of fertility and fecundity in the Australian sheep flock between 2006 and 2019. Scientific Reports, 14(17781), 1-11. [More Information]
Spanner, E., de Graaf, S., Rickard, J. (2024). Factors affecting the success of laparoscopic artificial insemination in sheep. Animal Reproduction Science, 264.
Crean, A., Pulpitel, T., Pini, T., Rickard, J., de Graaf, S., Senior, A., Simpson, S., Wali, J. (2024). Low-Fat, High-Carbohydrate Diets Reduce Body Weight and Sperm Count but Increase Sperm Motility in Mice. The Journal of Nutrition, 154(1), 60-68. [More Information]
J Robertson, M., Chambers, C., Spanner, E., de Graaf, S., Rickard, J. (2024). The Assessment of Sperm DNA Integrity: Implications for Assisted Reproductive Technology Fertility Outcomes across Livestock Species. Biology, 13(7). [More Information]
Spanner, E., de Graaf, S., Rickard, J. (2024). Uterine tone influences fertility of Merino ewes following laparoscopic artificial insemination. Theriogenology, 222, 45-53.

show 2 more

2023

Spanner, E., Rickard, J., de Graaf, S., Wilson, H., McMahon, J. (2023). Fertility of ram semen frozen in pellets or straws. Animal - Science Proceedings, 14(3), 431-548. [More Information]
Warr, S., Pini, T., de Graaf, S., Rickard, J. (2023). Molecular insights to the sperm–cervix interaction and the consequences for cryopreserved sperm. Biology Of Reproduction, 108(2), 183-196. [More Information]
Santolaria, P., Rickard, J., Perez-Pe, R. (2023). Understanding Sperm Quality for Improved Reproductive Performance. Biology, 12(7). [More Information]

2022

Hermes, R., Lecu, A., Potier, R., Rickard, J., Bohner, J., Wedlarski, R., Hruby, J., Hildebrandt, T. (2022). Cryopreservation of Giraffe Epidydimal Spermatozoa Using Different Extenders and Cryoprotectants. Animals, 12(7), 1-10. [More Information]
Rizkallah, N., Chambers, C., de Graaf, S., Rickard, J. (2022). Factors Affecting the Survival of Ram Spermatozoa during Liquid Storage and Options for Improvement. Animals, 12(3), 244. [More Information]
Rickard, J., Pool, K., de Graaf, S., Portas, T., Rourke, N., Wiesner, M., Hildebrandt, T., Goritz, F., Hermes, R. (2022). Increasing the Yield and Cryosurvival of Spermatozoa from Rhinoceros Ejaculates Using the Enzyme Papain. Biology, 11(2), 154. [More Information]
Van de Hoek, M., Rickard, J., de Graaf, S. (2022). Motility Assessment of Ram Spermatozoa. Biology, 11(1715). [More Information]
Tumeth, E., Rickard, J., Mercorelli, L., Gonzalez, L., de Graaf, S. (2022). The use of accelerometers for the remote detection of mounting in rams and testosterone-treated wethers. Computers and Electronics in Agriculture, 199, 107129. [More Information]

show 2 more

2021

Pool, K., Rickard, J., de Graaf, S. (2021). Melatonin improves the motility and DNA integrity of frozen-thawed ram spermatozoa likely via suppression of mitochondrial superoxide production. Domestic Animal Endocrinology, 74, 1-8. [More Information]

2020

Pool, K., Rickard, J., Pini, T., de Graaf, S. (2020). Exogenous melatonin advances the ram breeding season and increases testicular function. Scientific Reports, 10(1), 9711. [More Information]
Green, C., Rickard, J., de Graaf, S., Crean, A. (2020). From One Ejaculate to Another: Transference of Sperm Traits via Seminal Plasma Supplementation in the Ram. Biology, 9(2), 1-9. [More Information]
Pool, K., Rickard, J., de Graaf, S. (2020). Global Methylation and Protamine Deficiency in Ram Spermatozoa Correlate with Sperm Production and Quality but Are Not Influenced by Melatonin or Season. Animals, 10, 2302. [More Information]
Pool, K., Rickard, J., de Graaf, S. (2020). Overcoming neuroendocrine and metabolic barriers to puberty: the role of melatonin in advancing puberty in ewe lambs. Domestic Animal Endocrinology, 72, 1-10. [More Information]
Leahy, T., Rickard, J., Pini, T., Gadella, B., de Graaf, S. (2020). Quantitative Proteomic Analysis of Seminal Plasma, Sperm Membrane Proteins, and Seminal Extracellular Vesicles Suggests Vesicular Mechanisms Aid in the Removal and Addition of Proteins to the Ram Sperm Membrane. Proteomics, 20(12), 1900289. [More Information]
Rickard, J., de Graaf, S. (2020). Sperm surface changes and their consequences for sperm transit through the female reproductive tract. Theriogenology, 150, 96-105. [More Information]
Pool, K., Rickard, J., Tumeth, E., de Graaf, S. (2020). Treatment of rams with melatonin implants in the non-breeding season improves post-thaw sperm progressive motility and DNA integrity. Animal Reproduction Science, 221, 106579. [More Information]

show 4 more

2019

Al-Bulushi, S., Manjunatha, B., Bathgate, R., Rickard, J., de Graaf, S. (2019). Artificial insemination with fresh, liquid stored and frozen thawed semen in dromedary camels. PloS One, 14(11), 1-14. [More Information]
Al-Bulushi, S., Manjunatha, B., Bathgate, R., Rickard, J., de Graaf, S. (2019). Liquid storage of dromedary camel semen in different extenders. Animal Reproduction Science, 207, 95-106. [More Information]
Leahy, T., Rickard, J., Bernecic, N., Druart, X., de Graaf, S. (2019). Ram seminal plasma and its functional proteomic assessment. Reproduction, 157(6), R243-R256. [More Information]
Al-Bulushi, S., Manjunatha, B., de Graaf, S., Rickard, J. (2019). Reproductive seasonality of male dromedary camels. Animal Reproduction Science, 202, 10-20. [More Information]
Druart, X., Rickard, J., Tsikis, G., de Graaf, S. (2019). Seminal plasma proteins as markers of sperm fertility. Theriogenology, 137, 30-35. [More Information]
Rickard, J., Pool, K., Druart, X., de Graaf, S. (2019). The fate of spermatozoa in the female reproductive tract: A comparative review. Theriogenology, 137, 104-112. [More Information]

show 3 more

2018

Pini, T., Rickard, J., Leahy, T., Crossett, B., Druart, X., de Graaf, S. (2018). Cryopreservation and egg yolk medium alter the proteome of ram spermatozoa. Journal of Proteomics, 181, 73-82. [More Information]
Al-Bulushi, S., Manjunatha, B., Bathgate, R., Rickard, J., de Graaf, S. (2018). Effect of semen collection frequency on the semen characteristics of dromedary camels. Animal Reproduction Science, 197, 145-153. [More Information]
Pool, K., Rickard, J., Leahy, T., Pini, T., de Graaf, S. (2018). Treatment of rams with melatonin in the non-breeding season improves the post-thaw quality of spermatozoa. Animal Reproduction Science, 194, e17-e17. [More Information]

2017

Maddison, J., Rickard, J., Bernecic, N., Tsikis, G., Soleilhavoup, C., Labas, V., Combes-Soia, L., Harichaux, G., Druart, X., Leahy, T., de Graaf, S. (2017). Oestrus synchronisation and superovulation alter the cervicovaginal mucus proteome of the ewe. Journal of Proteomics, 155, 1-10. [More Information]
Rickard, J., Ryan, G., Hall, E., de Graaf, S., Hermes, R. (2017). Using transrectal ultrasound to examine the effect of exogenous progesterone on early embryonic loss in sheep. PloS One, 12(8), 1-18. [More Information]

2016

Leahy, T., Rickard, J., Aitken, J., de Graaf, S. (2016). D-penicillamine prevents ram sperm agglutination by reducing the disulphide bonds of a copper-binding sperm protein. Reproduction, 151(5), 491-500. [More Information]
Rickard, J., Leahy, T., Druart, X., de Graaf, S. (2016). Exposure to seminal plasma reduces the duration that epididymal ram spermatozoa exhibit wave motion. Animal Reproduction Science, 169, 118-118. [More Information]
Maddison, J., Rickard, J., Mooney, E., Bernecic, N., Soleilhavoup, C., Tsikis, G., Druart, X., Leahy, T., de Graaf, S. (2016). Oestrus synchronisation and superovulation alter the production and biochemical constituents of ovine cervicovaginal mucus. Animal Reproduction Science, 172, 114-122. [More Information]
Leahy, T., Rickard, J., de Graaf, S. (2016). Penicillamine attenuates agglutination of ram spermatozoa in capacitating media through the reduction of disulphide bonds on a sperm binding protein. Animal Reproduction Science, 169, 95-95. [More Information]
Leahy, T., Rickard, J., Aitken, J., de Graaf, S. (2016). Penicillamine prevents ram sperm agglutination in media that support capacitation. Reproduction, 151(2), 167-177. [More Information]
Pini, T., Leahy, T., Soleilhavoup, C., Tsikis, G., Labas, V., Combes-Soia, L., Harichaux, G., Rickard, J., Druart, X., de Graaf, S. (2016). Proteomic Investigation of Ram Spermatozoa and the Proteins Conferred by Seminal Plasma. Journal of Proteome Research, 15(10), 3700-3711. [More Information]
Rickard, J., Pini, T., Leahy, T., de Graaf, S. (2016). Species specific sorting protocol required for the production of high quality chill- and frozen-stored sex-sorted ram sperm. 18th International Congress on Animal Reproduction, N/A: N/A.
Rickard, J., Schmidt, R., Maddison, J., Bathgate, R., Lynch, G., Druart, X., de Graaf, S. (2016). Variation in seminal plasma alters the ability of ram spermatozoa to survive cryopreservation. Reproduction, Fertility and Development, 28(4), 516-523. [More Information]

show 5 more

2015

Rickard, J., Leahy, T., Soleilhavoup, C., Tsikis, G., Labas, V., Harichaux, G., Lynch, G., Druart, X., de Graaf, S. (2015). The identification of proteomic markers of sperm freezing resilience in ram seminal plasma. Journal of Proteomics, 126, 303-311. [More Information]

2014

Maddison, J., Rickard, J., Bathgate, R., Druart, X., de Graaf, S. (2014). Changes to ovine cervical mucus induced by the oestrous cycle, oestrus synchronisation and superovulation. European Society for Reproduction in Domestic Animals, Italy: Reproduction in Domestic Animals.
de Graaf, S., Rickard, J., Pini, T., Maddison, J., Druart, X., Leahy, T. (2014). Emerging Roles of Seminal Plasma in Sperm Function. 9th Biennial Conference of the Association for Applied Animal Andrology, Newcastle: Association for Applied Animal Andrology.
Rickard, J., Pini, T., Soleilhavoup, C., Cognie, J., Bathgate, R., Lynch, G., Evans, G., Maxwell, W., Druart, X., de Graaf, S. (2014). Seminal plasma aids the survival and cervical transit of epididymal ram spermatozoa. Reproduction, 148, 469-478. [More Information]

2013

Rickard, J., Maddison, J., Pini, T., Bathgate, R., Evans, G., Maxwell, W., Lynch, G., Druart, X., de Graaf, S. (2013). Exposure to seminal plasma aids the migration of epididymal ram spermatozoa through the cervix. The Annual Conference of the Australian Society for Reproductive Biology, Australia: Australian Society for Reproductive Biology.
de Graaf, S., Rickard, J., Maddison, J., Bathgate, R., Druart, X. (2013). Impaired transport of liquid and frozen stored spermatozoa through the cervix. Reproduction in Domestic Animals, 48(1), 63-63. [More Information]
de Graaf, S., Rickard, J., Maddison, J., Bathgate, R., Druart, X. (2013). Impaired transport of liquid and frozen stored spermatozoa through the cervix. European Society for Reproduction in Domestic Animals, Italy: Reproduction in Domestic Animals.
Druart, X., Rickard, J., Mactier, S., Kohnke, P., Kershaw-Young, C., Bathgate, R., Gibb, Z., Crossett, B., Tsikis, G., Labas, V., Grupen, C., de Graaf, S., et al (2013). Proteomic characterization and cross species comparison of mammalian seminal plasma. Journal of Proteomics, 91, 13-22. [More Information]
Rickard, J., Bathgate, R., Maddison, J., Schmidt, R., Lynch, G., Druart, X., de Graaf, S. (2013). The effect of seminal plasma from rams with varied freezing resilience on the cryosurvival of ram spermatozoa. European Society for Reproduction in Domestic Animals, Italy: Reproduction in Domestic Animals.

show 2 more

2012

Rickard, J., Kohnke, P., Bathgate, R., Druart, X., Lynch, G., de Graaf, S. (2012). A preliminary assessment of the ram spermatozoa glycoproteome using 2DLC-MS/MS. International Congress on Animal Reproduction, Canada: Reproduction in Domestic Animals.
de Graaf, S., Grupen, C., Rickard, J., Bathgate, R., Mactier, S., Kohnke, B., Crossett, B., Maxwell, W., Christopherson, R., Druart, X. (2012). Identification of Membrane Glycoproteins of Ejaculated and Epididymal Boar Spermatozoa Using LC-MS/MS. The 2nd World Congress of Reproductive Biology, N/A: N/A.

Selected Grants

2023

Unravelling the sperm-cervix transcriptome in sheep, Rickard J, Society for Reproductive Biology/Early and Mid-Career Research Seed Grant

2022

Prediction of AI success & semen standards, Rickard J, de Graaf S, Australian Wool Innovation Limited/Research and Development

2019

Sensing technologies to reduce reproductive wastage, de Graaf S, Rickard J, Australian Wool Innovation Limited/Research and Development

2018

Fertility of sexed ram semen, de Graaf S, Leahy T, Pini T, Rickard J, Australian Wool Innovation Limited/Call for Proposals On-Farm R&D, Off-Farm R&D

2015

Fertility of sexed ram semen, de Graaf S, Leahy T, Rickard J, Australian Wool Innovation Limited/Research Support

Nominated for the Cooperative Research Centres Association (CRCA) Early Career Researcher Award

In the media

Featured in The Weekly Times:"New technologies are available in sheep artificial breeding"	4 July 2019
Featured in The Land:"AWI and University of Sydney investigate sensor use in sheep"	26 June 2019
Featured in Sheep Central:"Flystrike, welfare and profit focus at 2019 Merinolink conference"	27 May 2019
Featured on CountryNEWS:"Semen still viable"	4 Apr 2019
Research featured on ABC’s Landline:Sheep and Science: Merino lambs sired 50 years ago	2 Apr 2019
Featured in Countryman: "Breeders mingle, chat at stud group's AGM	21 Mar 2019
Featured in Forbes Magazine:"When 50-year-old sperm was thawed, the swimmers actually outperformed far newer ones"	20 Mar 2019
Featured in Smithsonian Magazine:"Healthy Baby Lambs Using World's Oldest Sperm"	20 Mar 2019
Featured in Cosmos Magazine:"Half-century-old sperm still up to the job"	19 Mar 2019
Featured in the NZ Herald:"World's oldest ram semen still viable"	19 Mar 2019
Featured in The Guardian:"Sir Freddie the ram's 50-year-old frozen sperm used to produce offspring".	18 Mar 2019
Featured in the New York Post:"World's oldest semen still packs a potent punch, researchers say"	18 Mar 2019
Featured in CNN:"Lambs born from world's oldest stored semen"	18 Mar 2019
Featured in the Mirror:"World's oldest semen is still viable 50 years after it was first stored"	18 Mar 2019
Featured in The Independent."50-year-old semen still works, scientists find"	18 Mar 2019
Featured in The Times:"Ewe can't hurry love: sperm from 1968 produces lams"	18 Mar 2019
Featured on CNET:"World's oldest semen makes sheep babies 50 years later - This is ewe-inspiring research"	18 Mar 2019
Featured in the University of Sydney News: "World's oldest semen still viable"	18 Mar 2019
Featured in IFL Science:"World's Oldest Frozen Semen Successfully Impregantes Dozens of Sheep"	17 Mar 2019
Featured on ABC News online"How a Cold War scientist escaped a gulag to pioneer reproductive technology using sheep semen"	16 Mar 2019
Featured in Australian Wool Magazine,Beyond The Bale. "Sexed semen via AI to enable selection of ram or ewe lambs" and " 50-year-old ram semen achieves high fertility"	Dec 2018
Featured inThe Manly Daily.Simon's work with Pittwater High School teaching students about agriculture. The "School's New Cuddly Pupil", Samson, was born as a result of Simon artificially inseminating a ewe with the help of Year 11 and 12 students	Dec 2018
Research featured inBeyond The Bale,"R&D into low cost, non-surgical 'cervical' artificial insemination using frozen semen"	Dec 2015
Featured inBeyond The Bale,"R&D into low cost, non-surgical cervical AI"	Mar 2014

Faculty of Science

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Dr Jessica Rickard

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Selected Grants

2023

2022

2019

2018

2015

In the media

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World's oldest semen still viable