Effects of ovarian input on GnRH and LH secretion immediately postovulation in pony mares

Effects of ovarian input on GnRH and LH secretion immediately postovulation in pony mares

The potential involvement of ovarian factors in regulating GnRH and LH postovulation was studied in ovarian intact (Group 1; n=3) and ovariectomized (OVX; Group 2; n=3) mares (OVX within 12 hr of ovulation). Blood samples were collected every 10 min for 6 hr from jugular vein (JV) and intercavernous...

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Veröffentlicht in:Theriogenology 2001-03, Vol.55 (5), p.1095-1106
Hauptverfasser: Greaves, H.E., Kalariotes, V., Cleaver, B.D., Porter, M.B., Sharp, D.C.
Format: Artikel
Sprache:eng
Schlagworte:
Animals
Feedback
Female
GnRH
Gonadotropin-Releasing Hormone - blood
Gonadotropin-Releasing Hormone - metabolism
Horses - physiology
Least-Squares Analysis
LH secretion
Luteinizing Hormone - blood
Luteinizing Hormone - metabolism
Ovariectomy - veterinary
ovary
Ovary - physiology
Ovulation - physiology
Progesterone - blood
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Zusammenfassung:The potential involvement of ovarian factors in regulating GnRH and LH postovulation was studied in ovarian intact (Group 1; n=3) and ovariectomized (OVX; Group 2; n=3) mares (OVX within 12 hr of ovulation). Blood samples were collected every 10 min for 6 hr from jugular vein (JV) and intercavernous sinus (ICS) during estrus and on Day 8 postovulation for LH and GnRH analysis. Additionally, JV samples were collected twice daily (12-hr intervals) for 30 days for LH and progesterone (P 4) analysis. A significant treatment × day effect (P
ISSN:0093-691X
1879-3231
DOI:10.1016/S0093-691X(01)00469-1