Administration of HCG seven days after estrous onset increases the pregnancy rate in Toggenburg goats subjected to induction of synchronized estrus and natural mating.

The dominant follicle reaches its maximum diameter on the sixth day after ovulation or seven days after the onset of estrus (Castro et al., Theriogenology, 52: 399-411, 1999). This study investigated the effect of hCG administration on the seventh day after the onset of estrus (D7) on pregnancy rate in Toggenburg goats. The study was conducted during December and January in Piau, MG, Brazil (latitude 21°35?S and longitude 43°15?W). For statistical analysis, the chi-square test was used with a significance level of 5%. The pregnancy rate of the animals receiving hCG was superior (P=0.047) than those receiving saline [90.7% (39/43) and 74.4% (32/43)]. We conclude that the use of hCG seven days after hormonally induced-estrus is an efficient strategy to increase the pregnancy rate in dairy goats.

Bibliographic Details

Main Authors:	CORTÊS, L. R., FRAGA, M. O., SILVA, D. S., PRATES, J. F., MARTINS, B. B., FIGUEIRA, L. M., BONATO, G. C., ARRAIS, A. M., SOUZA-FABJAN, J. M. G., BRANDÃO, F. Z., FONSECA, J. F. da
Other Authors:	Universidade Federal Fluminense (UFF) - Niteroi, RJ, Brazil; Universidade do Grande Rio (Unigranrio) - Duque de Caxias, RJ, Brazil; Instituto Federal de Educação Ciência e Tecnologias Sudeste de Minas Gerais (IF Sudeste MG) - Rio Pomba, MG, Brazil; Universidade Presidente Antônio Carlos (UNIPAC) - MG, Brasil; Universidade Federal de Lavras (UFLA) - Lavras, MG, Brazil; Universidade Federal de Viçosa (UFV) - Viçosa, MG, Brazil; Universidade Federal Rural do Rio de Janeiro (UFRRJ) - Seropédica, RJ, Brazil.; Jeferson Ferreira da Fonseca, CNPC.
Format:	Anais e Proceedings de eventos biblioteca
Language:	English eng
Published:	2018-09-05
Subjects:	Sheep, Ewes, Animal reproduction,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1095118
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