Ovarian function in the buffalo and implications for embryo development and assisted reproduction

Area of Science:

• Reproductive Biology
• Animal Science
• Veterinary Medicine

Background:

• Buffaloes exhibit seasonal breeding patterns, primarily influenced by photoperiod (day length).
• Reproductive function, including estrous cycles and postpartum ovulation resumption, is sensitive to nutritional status and environmental factors.
• Understanding ovarian and embryonic development is key to improving buffalo reproductive efficiency.

Purpose of the Study:

• To synthesize current knowledge on ovarian physiology in buffaloes, encompassing folliculogenesis, ovulation, and corpus luteum function.
• To examine embryonic development in buffaloes and its relationship with reproductive processes.
• To highlight the need for assisted breeding technologies for out-of-season breeding in buffaloes.

Main Methods:

• This study is a review of existing literature on buffalo reproductive physiology.
• Information was gathered on folliculogenesis, ovulation, corpus luteum development and function, and embryonic development.
• Comparative aspects with cattle reproductive physiology were considered.

Main Results:

• Buffaloes are short-day breeders, but can cycle year-round in equatorial regions with adequate nutrition.
• Photoperiod significantly affects reproductive seasonality in subtropical and higher latitude buffalo populations.
• Embryonic development in buffaloes is faster than in cattle, with tighter temporal integration of conceptus development, corpus luteum function, and maternal recognition of pregnancy.

Conclusions:

• Ovarian and embryonic development in buffaloes are tightly regulated by photoperiod and nutrition.
• The rapid embryonic development and critical embryonic attachment phase underscore the need for advanced reproductive technologies.
• Assisted breeding is essential for managing out-of-season breeding and enhancing the productive value of buffaloes.