Inhibition of multiple ovulation in hypophysectomized hens treated with gonadotrophins

Recombinant versus urinary gonadotrophins for triggering ovulation in assisted conception.

BACKGROUND The objective of this systematic review was to assess the safety and efficacy of subcutaneous recombinant (r) HCG and high-dose rLH compared with intramuscular urinary (u) uHCG for inducing final oocyte maturation and triggering ovulation. METHODS We searched the Cochrane Menstrual Disorders and Subfertility Group trials register (August 27, 2003), the Cochrane Central Register of ...

Circulating levels of gonadotrophins in immature mice treated neonatally with antisera to gonadotrophins.

Timing Ovulation in Ewes Treated with Ovsynch Different Times of PGF2 αInjection during the Breeding Season

This study was carried out at Sakha Animal Production Research Station, during the period from Oct., 2009 to Sept., 2010. Forty Rahmani ewes were divided into three treatment groups: the 1st, 2nd and 3rd treatment groups were intramuscularly injected (Day 0) with 1 mL GnRH analogue followed by an intramuscular injection with 0.7 mL PGF2α5 (G1), 6 (G2) or 7 (G3) days later. A second dose of 1 mL...

Amounts of gonadotrophins required for normal follicular growth in hypophysectomized adult rats.

PMS and HCG, in such a way that rather constant blood levels could be expected. They were killed 24 hours later. It was found that the minimal doses of the substitutional gonadotrophins required to maintain normal follicular growth, were considerably higher during the period from prooestrus to oestrus (when a new generation of follicles starts its development) than during all other periods. Thi...

Meiosis and Inhibition of Ovulation in Mouse Eggs Treated with Actinomycin D

Barros and Austin (1) have reported on the inhibition of ovulation in the golden hamster by parenteral actinomycin D (AMD). During studies aimed at characterising the meiotic chromosome damage induced by various inhibitors of DNA, RNA, and protein, the author has made some observations in vitro and in vivo on the effects of AMD on female mouse meiosis . These data extend the information of Barr...