Evaluation of methodology for administration of porcine FSH for use in estrus induction and for increasing ovulation rate in prepubertal gilts

Theriogenology
Amy L JacksonRobert V Knox

Abstract

Ovulation rate influences production efficiency of oocytes and embryos and depends upon the amount of gonadotropin administered and the ratio of FSH:LH activity. In Experiment 1, gilts (n=135) were assigned to receive 10 or 15 Armour units (AU) of porcine FSH containing 6%, 10%, or 15% LH, whereas controls received PG600. Gilts received 1/6th the FSH dose in six sc administrations at 8-h intervals. There was no treatment effect on incidence of estrus (66%) or cysts (23.9%), or number of corpora lutea (CL, 29.6). However, treatment did affect the percentage of gilts ovulating (P<0.05) with fewer 10 AU FSH with 15% LH-treated gilts ovulating (15%) compared to controls (72%), whereas the other treatments did not differ (range, 44-65%). Experiment 2 tested whether FSH in polyvinlypyrrolidinone (PVP) could induce estrus and ovulation with reduced administration frequency. Gilts (n=105) were assigned to receive 15 AU FSH with 10% LH in one (1P) or two sc administrations (2P) whereas controls received PG600. There was no treatment effect on incidence of estrus (64%) or cysts (22%). However, the percentage of gilts ovulating was lower for 1P (56%), but did not differ (P<0.05) between 2P (83%) and controls (85%). Treatment influenced ov...Continue Reading

References

Mar 1, 1979·Journal of Reproduction and Fertility·C Menzer, D Schams
Mar 23, 2000·Theriogenology·Y Cognie
Aug 31, 2002·Molecular Reproduction and Development·Elena PopovaMichael Bader
Mar 11, 2003·Reproduction, Nutrition, Development·Reuben J MapletoftGregg P Adams

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Citations

Nov 16, 2010·Animal Reproduction Science·Junhe HuHuayan Wang
Feb 6, 2007·Theriogenology·J Kauffold, G C Althouse
Nov 13, 2008·Reproduction in Domestic Animals = Zuchthygiene·R ManjarinR N Kirkwood

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