Effect of follicular dominance on in vivo recovery rate and on in vitro oocyte competence in Bubalus bubalis, Bos indicus and Bos taurus

• Grant number: 07/04782-2
• Support Opportunities: Regular Research Grants
• Start date: October 01, 2007
• End date: September 30, 2009
• Field of knowledge: Agronomical Sciences - Veterinary Medicine - Animal Reproduction
• Principal Investigator: Pietro Sampaio Baruselli
• Grantee: Pietro Sampaio Baruselli
• Host Institution: Faculdade de Medicina Veterinária e Zootecnia (FMVZ). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

In the present study two experiments will be performed, in order to evaluate OPU time effect on in vitro embryo production in Bubalus bubalis, Bos indicus and Bos taurus. For this purpose the first follicular wave will be synchronized with progestin associated to estradiol benzoate plus injectable progesterone. OPU will be performed 2, 4 and 6 days after follicular wave emergence, in a cross-over design. Variables analyzed will be recovery rate, oocyte quality (number of cumulus oophorus layers and cytoplasm aspect) and embryo quality (cleavage rate, blastocyst yield, hatching rate, and nucleus counting). (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

GIMENES, LINDSAY U.; FERRAZ, MARCIO L.; FANTINATO-NETO, PAULO; CHIARATTI, MARCOS R.; MESQUITA, LIGIA G.; SA FILHO, MANOEL F.; MEIRELLES, FLAVIO V.; TRINCA, LUZIA A.; RENNO, FRANCISCO P.; WATANABE, YEDA F.; et al. The interval between the emergence of pharmacologically synchronized ovarian follicular waves and ovum pickup does not significantly affect in vitro embryo production in Bos indicus, Bos taurus, and Bubalus bubalis. Theriogenology, v. 83, n. 3, p. 385-393, FEB 2015. (07/04782-2)