The dairy industry in the United States has changed dramatically in the last decade. Milk
production per cow has increased steadily because of a combination of improved …

In this review, the main features of folliculogenesis are summarized and compared among
species. In the past few years, ultrasonography has clarified follicle growth patterns, and our …

Reproductive failure in inseminated cattle results from poor fertilization and embryo survival.
Recent studies utilizing dairy and beef cattle indicate that fertilization rates are higher for …

Higher systemic progesterone in the immediate post-conception period is associated with an
increase in embryonic growth rate, interferon-tau production and pregnancy rate in cattle …

Early estrus-synchronization protocols focused on regressing the corpus luteum (CL) with an
injection of PGF2α followed by detection of estrus or involved the use of exogenous …

Previous work suggests that a number of factors such as follicle size, day of estrous cycle,
and level of atresia influence the developmental potential of bovine oocytes in vitro. To …

An intravaginal progesterone insert (CIDR insert; 1.38 g of progesterone) was evaluated for
synchronization of returns to estrus (SR), conception rate (CR), and pregnancy rate (PR) in …

Objective—To identify potential risk factors for embryonic loss before 35 to 42 days of
gestation in dairy cattle. Design—Prospective observational study. Animals—381 cows …

We aimed to evaluate the effects and the interaction of size of the preovulatory follicle (POF)
and long-acting progesterone (P4) supplementation after timed-AI on CL function and …

Original methods for controlling the oestrous cycle of cattle were based on extending or
reducing the luteal phase to produce a synchronised decline in concentrations of …