Titles and Education

1. PhD in Animal Science, 2016
   Michigan State University, East Lansing, Michigan
2. MS in Animal Science, 2011
   Michigan State University, East Lansing, Michigan
3. DVM, 2005 
   Universidade Federal Fluminense (UFF), Niterói, Rio de Janeiro, Brazil
    

Research

Dr. Martins’ research interests include ovarian follicle development, luteolysis, embryonic and fetal development, pregnancy maintenance and synchronization of ovulation strategies. His research focuses on improving reproductive performance of lactating dairy cows through the use of practical reproductive management technologies.

Responsibilities

Dr. Martins is responsible for coordinating and instructing the fourth-year clinical rotation Dairy Skills 1, 2, and 3 and teaching bovine reproduction to third-year students

Clinical Interests

Dr. Martins' clinical activities include troubleshooting poor reproductive performance for dairy herds in Wisconsin.

Graduate Training

PhD: Michigan State University (Animal Science), 2016

MS: Michigan State University (Animal Science), 2011

DVM: UFF (Federal Fluminense University – Niterói, Rio de Janeiro, Brazil), 2005

Recent Publications

1. Cunha, T. O., Statz, L. R., Domingues, R. R., Andrade, J., Wiltbank, M. C., & Martins, J. (2022). Accessory corpus luteum induced by human chorionic gonadotropin on day 7 or days 7 and 13 of the estrous cycle affected follicular and luteal dynamics and luteolysis in lactating Holstein cows. Journal of dairy science, 105(3), 2631–2650. https://doi.org/10.3168/jds.2021-20619
2. Cunha, T. O., Martinez, W., Walleser, E., & Martins, J. (2021). Effects of GnRH and hCG administration during early luteal phase on estrous cycle length, expression of estrus and fertility in lactating dairy cows. Theriogenology, 173, 23–31. https://doi.org/10.1016/j.theriogenology.2021.06.010
3. Martins, J., Wang, D., Mu, N., Rossi, G. F., Martini, A. P., Martins, V. R., & Pursley, J. R. (2018). Level of circulating concentrations of progesterone during ovulatory follicle development affects timing of pregnancy loss in lactating dairy cows. Journal of dairy science, 101(11), 10505–10525. https://doi.org/10.3168/jds.2018-14410
4. Martins, J., Acevedo, M., Cunha, T., Piterini, C., & Pursley, J. (2017). The effect of presynchronization with prostaglandin F2α and gonadotropin-releasing hormone simultaneously, 7 d before Ovsynch, compared with Presynch-10/Ovsynch on luteal function and first-service pregnancies per artificial insemination. Journal of Dairy Science, 100(6), 5107–5116. https://doi.org/10.3168/jds.2016-11628
5. Ali Channa, A., Martins, J. P. N., Jimenez-Krassel, F., & Pursley, J. R. (2017). Inducing sub-luteal circulating concentrations of progesterone and persistent follicles in Holstein heifers and non-lactating cows using a modified CIDR device. Livestock Science, 198, 191–194. https://doi.org/10.1016/j.livsci.2017.02.028
6. Martins, J. P. N., & Pursley, J. R. (2016). Fertility programs for lactating dairy cows, their physiological basis, and the factors that are critical for their success. Animal Reproduction, 13(3), 283–289. https://doi.org/10.21451/1984-3143-ar881
7. Yousuf, M. R., Martins, J., Ahmad, N., Nobis, K., & Pursley, J. R. (2016). Presynchronization of lactating dairy cows with PGF2α and GnRH simultaneously, 7 days before Ovsynch have similar outcomes compared to G6G. Theriogenology, 86(6), 1607–1614. https://doi.org/10.1016/j.theriogenology.2016.05.021
8. Yousuf, M. R., Martins, J., Ahmad, N., Nobis, K., & Pursley, J. R. (2016). Presynchronization of lactating dairy cows with PGF2α and GnRH simultaneously, 7 days before Ovsynch have similar outcomes compared to G6G. Theriogenology, 86(6), 1607–1614. https://doi.org/10.1016/j.theriogenology.2016.05.021