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A. B. Nascimento
Researcher at University of Wisconsin-Madison
Publications - 26
Citations - 1036
A. B. Nascimento is an academic researcher from University of Wisconsin-Madison. The author has contributed to research in topics: Ovulation & Follicular phase. The author has an hindex of 16, co-authored 26 publications receiving 887 citations. Previous affiliations of A. B. Nascimento include University of São Paulo.
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Journal ArticleDOI
Improving fertility to timed artificial insemination by manipulation of circulating progesterone concentrations in lactating dairy cattle.
TL;DR: Previous research has provided substantial insights into mechanisms regulating circulating P4 concentrations and actions, and understanding this prior research can focus future research on P4 manipulation to improve timed AI protocols.
Journal ArticleDOI
Effect of progesterone on magnitude of the luteinizing hormone surge induced by two different doses of gonadotropin-releasing hormone in lactating dairy cows.
Julio O. Giordano,Paul M. Fricke,J.N. Guenther,G. Lopes,M.M. Herlihy,A. B. Nascimento,Milo C. Wiltbank +6 more
TL;DR: It is concluded that the P4 environment at GnRH treatment dramatically affects GnRH-induced LH secretion, and that a 200-μg dose of GnRH can increase LH secretion in either a high- or a low-P4 environment.
Journal ArticleDOI
Managing the dominant follicle in lactating dairy cows.
Milo C. Wiltbank,Roberto Sartori,M.M. Herlihy,José Luiz Moraes Vasconcelos,A. B. Nascimento,A.H. Souza,H. Ayres,A.P. Cunha,Abdulkadir Keskin,J.N. Guenther,Ahmet Gümen +10 more
TL;DR: This review discusses the distinct aspects of follicular development in lactating dairy cows and the methodologies that have been utilized in the past two decades in order to manage the dominant follicle during synchronization of ovulation and timed AI programs.
Journal ArticleDOI
Presynchronization with Double-Ovsynch improves fertility at first postpartum artificial insemination in lactating dairy cows
M.M. Herlihy,Julio O. Giordano,A.H. Souza,H. Ayres,Roberta Machado Ferreira,Abdulkadir Keskin,A. B. Nascimento,J.N. Guenther,J.M. Gaska,S.J. Kacuba,Mark A. Crowe,Stephen T. Butler,Milo C. Wiltbank +12 more
TL;DR: Presynchronization with DO induced cyclicity in most anovular cows and improved fertility compared with PS, suggesting that DO could be a useful reproductive management protocol for synchronizing first service in commercial dairy herds.
Journal ArticleDOI
Effect of increasing GnRH and PGF2α dose during Double-Ovsynch on ovulatory response, luteal regression, and fertility of lactating dairy cows
Julio O. Giordano,Milo C. Wiltbank,Paul M. Fricke,Santiago Bas,Ray Pawlisch,J.N. Guenther,A. B. Nascimento +6 more
TL;DR: There were only marginal effects of increasing dose of GnRH or PGF2α on fertility to TAI after Double-Ovsynch on ovulation and luteolysis and therefore increase pregnancies per artificial insemination (P/AI).