In dairy cows inseminated during the hot months of the year, there is a decrease in fertility.
Different factors contribute to this situation; the most important are a consequence of …

The primary function of the corpus luteum is secretion of the hormone progesterone, which is
required for maintenance of normal pregnancy in mammals. The corpus luteum develops …

On the basis of gross and histologic study of ovaries, it was proposed in 1960 that two waves
of follicular activity occurred during bovine estrous cycles [1]. The two-wave hypothesis was …

Evaluation of follicular growth patterns by ultrasound combined with measurement of
circulating reproductive hormones has allowed designation of three functionally critical …

The objectives of this study were to characterize early postpartum (PP) follicular
development in dairy cows and to evaluate the influence of energy balance (EB) and the …

Selection of dominant follicles in cattle is associated with a deviation in growth rate between
the dominant and largest subordinate follicle of a wave (diameter deviation). To determine …

The objective of this experiment was to determine the effects of controlled heat stress on
ovarian function of lactating dairy cows. Estrus was synchronized (estrus= d 0), and cows …

The livestock industry and animal scientists have long recognized the importance of proper
nutrition for cattle to achieve reproductive success. Timely resumption of estrus following …

Ovarian follicular development in cattle is characterized by waves of growth during the
prepubertal and postpartum periods and during estrous cycles. Each wave of follicular …

The present study concerned the seasonal and acute effects of heat stress on steroid
concentrations in follicular fluid and on steroid production by granulosa and theca interna …