Department of Medical Sciences
Titles and Education
DVM, 2005, Universidade Federal Fluminense (UFF), Brazil
MS 2011, Michigan State University
PhD 2016, Michigan State University
Dr. Martins’s 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.
Dr. Martins is responsible for teaching the fourth year clinical rotation in Large Animal Theriogenology and bovine reproduction to third-year students. His clinical activities include troubleshooting poor reproductive performance for dairy herds in Wisconsin.
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
- Martins JPN, Wang D, Mu N, Rossi GF, Martini AP, Martins VR, Pursley JR. Level of circulating concentrations of progesterone during ovulatory follicle development affects timing of pregnancy loss in lactating dairy cows. Journal of Dairy Science. 2018. 101(11):10505-10525.
- Martins JPN, Acevedo MJT, Piterini C, Cunha TO, Pursley JR. The effect of pre-synchronization with PGF2α and GnRH simultaneously, 7 d prior to Ovsynch, compared to Presynch-10/Ovsynch on luteal function and first service pregnancies per AI. Journal of Dairy Science. 2017. 100(6):5107-5116.
- Aijaz AC, Martins JPN, Jimenez-Krassel F, Pursley JR. Technical Note: Inducing sub-luteal circulating concentrations of progesterone and persistent follicles in Holstein heifers and non-lactating cows using a modified CIDR device. Livestock Science. 2017. 198:191-194.
Martins JPN, Pursley JR. Fertility programs for lactating dairy cows, their physiological basis, and the factors that are critical for their success. Animal Reproduction. 2016. 13(3):283-289.
Yousuf MR, Martins JPN, Ahmad N, Nobis K, Pursley JR. Presynchronization of lactating dairy cows with PGF 2α and GnRH simultaneously, 7 days before Ovsynch have similar outcomes compared to G6G. Theriogenology. 2016. 86(6):1607-14
Yousuf, MR, Martins JPN, Husnain A, Riaz U, Riaz H, Sattar A, Javed K, Ahmad, N. Effect of oestradiol benzoate on oestrus intensity and pregnancy rate in CIDR treated anoestrus nulliparous and multiparous buffalo. Animal Reproduction Science. 2015. 159: 104-108.
Oliveira, LZ, Arruda RP, Andrade AFC, Celeghini ECC, Reeb, PD, Martins JPN, Santos RM, Beletti ME, Peres RFG, Monteiro FM, Lima VFMH. Assessment of in vitro sperm characteristics and their importance in the prediction of conception rate in a bovine timed-AI program. Animal Reproduction Science. 2013. 137(3): 145-155.
Oliveira LZ, Arruda RP, Andrade AFC, Santos RM, Beletti ME, Peres RFG, Martins JPN, Lima VFMH. Effect of simultaneous thawing of multiple semen straws and sequence of insemination on conception rate at timed artificial insemination in suckled multiparous Nelore cows. Theriogenology. 2012. 78(8): 1800-1813.
Pursley JR, Martins JPN. Impact of circulating concentrations of progesterone and antral age of the ovulatory follicle on fertility of high-producing lactating dairy cows. Reproduction, Fertility and Development. 2012. 24:1-5.
Pursley JR, Martins JPN, Wright C, Stewart ND. Cloprostenol sodium increased estrus detection, conception and pregnancy rates in lactating dairy cows compared to dinoprost tromethamine on a large commercial dairy. Theriogenology. 2012. 78(4): 823-829.
Martins JPN, Policelli RK, Neuder LM, Raphael W, Pursley JR. Effects of cloprostenol sodium at final prostaglandin F2α of Ovsynch on complete luteolysis and pregnancy per artificial insemination in lactating dairy cows. Journal of Dairy Science. 2011. 94(6): 2815-2824.
Martins JPN, Policelli RK, Pursley JR. Luteolytic effects of cloprostenol sodium in lactating dairy cows treated with G6G/Ovsynch. Journal of Dairy Science. 2011. 94(6): 2806-2814.