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Published on: July 30, 2020
Improved the in vitro blastocyst development in oocytes recovered from cyclic buffaloes
Muhammad Usman Mehmood1,2, Amjad Riaz2, Muhammad Shahzad3
1Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and Technology, Guangxi University, Nanning, China.
Abstract:
This study examined the impact of cyclicity (with or without cycle corpus luteum; CL) on oocyte quality and embryonic development in buffaloes. We collected oocytes from the ovaries of slaughtered buffaloes (N = 158 cyclic; n = 316 ovaries and N = 177 acyclic; n = 353 ovaries). Blood progesterone concentration and number of oocytes per ovary were higher in cyclic buffaloes. Cyclic buffalo ovaries produce higher oocytes with I + II and fewer III + IV grades. Oocytes from cyclic buffaloes had a higher maturation rate based on cumulus expansion, cleavage rate and embryo development to the 8-cell, morula and blastocyst stages than acyclic buffaloes. In conclusion, oocytes recovered from the ovaries of the cyclic buffaloes showed improved oocyte competence and subsequent in vitro blastocyst development.
