Variation in LH pulsatility during 24h after a postweaning altrenogest treatment in relation to follicle development in primiparous sows

This study assessed pulsatile release of LH during altrenogest treatment after weaning in primiparous sows and related this to follicle development, estrus and ovulation rate. Weaned sows (n =10) received altrenogest 20mg/day from D-1 to D13 (weaning=D0) at 0800h. On D13, blood samples were collecte...

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Bibliographic Details
Published in:Animal reproduction science 2011-06, Vol.126 (1-2), p.101-107
Main Authors: van Leeuwen, J.J.J, Martens, M.R.T.M, Jourquin, J, Driancourt, M.A, Kemp, B, Soede, N.M
Format: Article
Language:English
Subjects:
Animals
blood
estrus
Estrus Synchronization - drug effects
Female
hemorrhage
luteinizing hormone
Luteinizing Hormone - blood
Ovarian Follicle - physiology
ovulation
Parity - physiology
Pregnancy
sows
Swine
Trenbolone Acetate - administration & dosage
Trenbolone Acetate - analogs & derivatives
Trenbolone Acetate - pharmacology
Weaning
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Summary:This study assessed pulsatile release of LH during altrenogest treatment after weaning in primiparous sows and related this to follicle development, estrus and ovulation rate. Weaned sows (n =10) received altrenogest 20mg/day from D-1 to D13 (weaning=D0) at 0800h. On D13, blood samples were collected every 12min from 1000 until 1900h (1st sampling period) and from 2300h until 0800h (2nd sampling period). During the 1st sampling period, LH concentrations remained low and no LH pulses were detected in 8/10 sows. During the 2nd sampling period, average and basal LH concentrations (P
ISSN:0378-4320
1873-2232
DOI:10.1016/j.anireprosci.2011.04.015