INFUSION OF ESTRADIOL DURING THE LUTEAL PHASE OF THE ESTROUS CYCLE IN THE EWE COMPLETELY ELIMINATES LH PULSES

Autor:	I. B. J. K. Joseph, N. C. Rawlings
Rok vydání:	1990
Předmět:	Estrous cycle medicine.medical_specialty Endocrinology Lh secretion Food Animals Internal medicine Luteolysis Serum estradiol medicine Animal Science and Zoology Luteal phase Biology Tonic (physiology)
Zdroj:	Canadian Journal of Animal Science. 70:1147-1150
ISSN:	1918-1825 0008-3984
Popis:	Elevation of serum estradiol (E2) levels to ≈ 23 pg mL−1 on day 12 of the estrous cycle of the ewe eliminated LH pulses, but did not induce luteolysis and a preovulatory surge release of gonadotropins. The E2 treatment appeared to exert a functional luteotropic effect. The results indicate a strong synergism between E2 and progesterone (P4) in the control of tonic LH secretion during the luteal phase and that P4 blocks the preovulatory LH surge mechanism at high, but physiological levels of E2. Key words: Estradiol, LH pulses, luteal phase, ewe, luteotropic
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6fd7e29439c2baf9fd236b7c7e4eb84c https://doi.org/10.4141/cjas90-140 Zobrazit plný text záznamu