The discovery of progesterone (P4) and elucidation of the mechanisms of P4 action have an
important place in the history of endocrinology and reproduction. Circulating P4 …

For heifers, beef and moderate-yielding dairy cows, it appears that the fertilisation rate
generally lies between 90% and 100%. For high-producing dairy cows, there is a less …

This manuscript reviews the effect of progesterone (P4) during timed AI protocols in lactating
dairy cows. Circulating P4 is determined by a balance between P4 production, primarily by …

Resumption of ovulation after parturition is a coordinated process that involves recoupling of
the GH/insulin-like growth factor 1 axis in the liver, increase in follicular development and …

The objectives of this study were to determine the effect of supplemental progesterone on
fertility in lactating dairy cows lacking a corpus luteum (CL) at the initiation of the timed …

Contents Over the last several decades, a number of therapies have been developed that
manipulate ovarian follicle growth to improve oocyte quality and conception rates in cattle …

Objectives were to determine the effect of progesterone (P4) concentration on fertility of
lactating dairy cows induced to ovulate follicles of the first follicular wave. Lactating dairy …

A systematic review of the literature was performed with the objective to evaluate the effects
of progesterone supplementation using a single intravaginal insert during timed artificial …

Contents It is generally accepted that progesterone (P4) is a key regulator of reproductive
function in mammals. In cattle, the primary focus of P4's actions has been uterine receptivity …

The objectives were to determine the effect of progesterone supplementation on fertility
responses in lactating dairy cows without corpora lutea (CL) at initiation of the timed artificial …