In this review, the possibility to manipulate the farrowing period using progestagen
will be addressed.
Estrus synchronization in sheep and goats using combinations of GnRH, progestagen
and prostaglandin F2[alpha].
Leyva V, Buckrell BC, Walton JS (1998) Regulation of follicular activity and ovulation in ewes by exogenous progestagen
Preliminary studies on the use of an oral progestagen
to induce estrous and ovulation in seasonally anoestrous Thoroughbred mares.
Djerassi, now 88 years old, was one of three researchers whose formulation of the synthetic progestagen
Norethisterone marked a key step in the creation of the first oral contraceptive pill.
A new strategy for superior reproductive performance of ewes bred outof-season utilizing progestagen
supplement prior to withdrawal of intravaginal pessaries Theriog.
Both reports showed that when goats exhibited estrus until 30h after progestagen
treatment, a fertility rate of 65% was observed following AI using frozen-thawed semen, but when estrus was observed at intervals of 49 or 72h after hormone treatment, a pregnant goat rate of only 25% was verified (BARIL et al.
Effect of long-term and short-term progestagen
treatment on folicular development and pregnancy rate in cyclic ewes.
After two or three times of estrus, a progestagen
was provided to gilts for 14 d to synchronize estrus cycle of gilts (Regumate[R], 20 mg/d, Janssen-Cilag, Issyles-Moulineaux, France).
6) An alternative strategy to deal with tamoxifen--induced endometrial changes and the symptoms they cause is to render the uterine tissues unresponsive to estrogenic stimulation using progestagen
Ovarian follicular wave emergence after treatment with progestagen
and estradiol in cattle.
The highest pregnancy rate obtained by the group submitted to the progestagen
intravaginal devices protocol, is emphasized.
Women with bothersome symptoms who haven't had a hysterectomy must take estrogen with a progestagen
to prevent estrogen-induced endometrial (uterine) cancer, and some progestagens
appear to increase the risk of breast cancer.
Lower systemic progestagen
levels in women taking ET in conjunction with LNG-IUS have been shown.
Bone mineral density during long-term use of the progestagen
contraceptive implant Implanon compared to a non-hormonal method of contraception.