BACKGROUND The LH surge induces great physiological changes within the preovulatory
follicle, which culminate in the ovulation of a mature oocyte that is capable of supporting …

Fully grown mammalian oocytes are arrested at the first meiotic prophase until a surge of
gonadotrophin at the mid-cycle. The actions of gonadotrophins, follicle stimulating hormone …

The objective was to examine the effects of presynchronization and bovine somatotropin
(bST) on pregnancy rates to a timed artificial insemination protocol in lactating dairy cows …

The objective of this study was to compare the ultrastructure of bovine blastocysts produced
in vivo or in vitro by using morphometric analysis. Blastocysts produced in vivo (multiple …

This study examined the influence of the following growth factors and cytokines on early
embryonic development: insulin-like growth factors I and II (IGF-I, IGF-II), basic fibroblast …

Objectives of the research were to examine the effect of bovine somatotropin (bST) on
pregnancy rates to a timed artificial insemination protocol and to test a re-synchronization …

The quality and developmental capacity of oocytes derived from in vitro maturation (IVM)
remain unsatisfactory, which greatly impairs the efficiency and application of embryo …

Both the endocrine and nervous systems function to initiate, coordinate, or regulate the
functions of the reproductive system. The endocrine system uses chemical messengers or …

The growth and maturation of the ovarian follicle requires the coordinate function of somatic
cells and the oocyte. Over the past three decades, numerous growth factors involved in the …

Previous studies indicated that the use of bovine somatotropin (bST) in concurrence with a
timed artificial insemination (TAI) protocol increased pregnancy rates. However, the …