Effects of gonadotropin treatment on ovarian follicle growth and granulosal cell aromatase activity in prepuberal gilts

Journal of Animal Science
H D GuthrieB S Cooper

Abstract

This experiment was conducted to compare the ability of USDA porcine FSH-B-1 (pFSH), USDA porcine LH-B-1 (pLH), and pregnant mare's serum gonadotropin (PMSG) to grow large follicles and induce granulosal cell aromatase activity in prepuberal gilts. Twenty-four gilts (164 d old) received one of four treatments by i.m. injection: 1) saline once, n = 8; 2) pFSH (8 micrograms/kg BW, nine times at 8-h intervals), n = 5; 3) pLH (2 micrograms/kg BW, nine times at 8-h intervals), n = 6; or 4) PMSG (15 IU/kg BW, once), n = 5. At slaughter, 72 h after the first injection, the ovaries to saline-treated gilts contained an average of 104 surface antral follicles 1 to 3 mm in diameter. compared to treatment with saline, pFSH increased (P less than .05) the number of follicles 46%, whereas pLH or PMSG decreased (P less than .05) the number by 70 and 84%, respectively. Compared with saline, treatment with PMSG or pLH induced growth of large follicles (7 to 9 mm) (10.8 and 4.8 follicles/gilt, respectively), increased plasma estrogen, increased granulosal cell aromatase activity, and decreased plasma FSH by 51 and 69%; treatment with pFSH had no significant effect on these traits. Results indicate that injected pFSH did not cause growth of large...Continue Reading

Citations

Nov 13, 2008·Reproduction in Domestic Animals = Zuchthygiene·R ManjarinR N Kirkwood
Dec 17, 2008·Reproduction in Domestic Animals = Zuchthygiene·R GerritsenB Kemp
Jan 18, 2008·Reproduction in Domestic Animals = Zuchthygiene·R GerritsenB Kemp
Oct 3, 2008·Acta Veterinaria Hungarica·Tomasz SchwarzJacek Nowicki
Nov 7, 2013·Reproduction, Fertility, and Development·J J J van LeeuwenN M Soede
Oct 29, 2008·Reproduction in Domestic Animals = Zuchthygiene·R ManjarinR N Kirkwood
Jun 16, 2010·Theriogenology·Srinivas V SeekalluNorman C Rawlings
May 15, 2021·Journal of Animal Science and Technology·Olli PeltoniemiTaehee Han

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