Follicular dynamic and ovulation in cattle – a review

Abstract

SummaryA review is given about follicular populations and aspects of follicular development in cattle. Ovaries of cattle contain two different pools of follicles, the non-growing pool and the growing pool. Entry of primordial follicles into the growth phase occurs throughout the reproductive life. Once follicles are recruited to grow, they are destined to undergo atresia or ovulation. Growth of obligatory gonadotropin-dependent follicles occurs in a wave like pattern. The growth waves are characterised by the processes of recruitment, selection and dominance. The known mechanisms responsible for these three processes are discussed.

Reproductive Physiology and Ovarian Folliculogenesis Examined via 1H-NMR Metabolomics Signatures: A Comparative Study of Large and Small Follicles in Three Mammalian Species (Bos taurus, Sus scrofa domesticus and Equus ferus caballus)

“…Clearly, follicle development progresses quite differently in pigs, a polyovular species, compared with monovular species. While mares have a single preovulatory follicle that reaches an average diameter of 40 mm (Aurich, 2011), and cows have a single preovulatory follicle that ranges in diameter from 12 to 20 mm (Kanitz, 2003), domestic sows have as many as 30 preovulatory follicles on both ovaries, each with a diameter of about 8 mm (Soede et al, 2011). Therefore, one would expect the FF changes taking place as the follicles of sows increase in size to be more subtle than those occurring as the follicles of cows and mares attain dominance.…”

Prostaglandin based estrus synchronization in cattle: A review

“…Non-growing (primordial follicles) and growing (primary, secondary and tertiary) population of follicles are found in the ovary undergoing either development or degeneration as a wave-like pattern. It occurs throughout the reproductive life by the processes of recruitment, selection, dominance, and atresia by entering from the non-growth phase to a growing population (Kanitz et al, 2001;Oliveira et al, 2011;Senger, 2005;Wilhelm, 2003). According to Arthur (2001), Senger (2005, and Wilhelm (2003)'s report, follicular recruitment occurs every 8-10 days while the secretion of inhibin by the dominant follicle (DF) plays an important role on it (Zacarias et al, 2015).…”

Complement C3 and anti-testosterone antibody in the 150 kDa Bali cattle (Bos sondaicus/javanicus) subordinate follicular fluid peptide observed using MALDI-TOF/TOF-MS

“…Subordinate follicle is part of a cohort growing follicle 5-7 days prior to ovulation (Evans and Martin, 2000;Kanitz, 2003), and proteins with molecular weight of 150 kDa such as IGFBPs have been reported to implicate in a cohort growing follicle (Rivera and Fortune, 2003). Proteomic information regarding these is limited for Bali cattle.…”