PMID: 7542581Jan 1, 1995Paper

Effects of somatotropin on the conceptus, uterus, and ovary during maternal recognition of pregnancy in cattle

Domestic Animal Endocrinology
M C LucyL Badinga

Abstract

Effects of recombinant bovine somatotropin (rbST) on ovarian and uterine function and the production of components of the insulin-like growth factor (IGF) system were examined during the period of maternal recognition of pregnancy in cattle. Lactating dairy cows were treated with 25 mg/d rbST (n = 8) or saline (n = 8) for 16 d after estrus. Ovaries, uteri, and conceptuses were collected on Day 17 after estrus. The length (millimeters) of the conceptus was recorded. The concentration of IGF-I and the content of IGF-binding proteins (BP) in uterine flushings were determined. Corpora lutea (CL) were weighed, and the number of follicles (> or = 2 mm in diameter) were counted. Follicular fluid from the largest and second-largest follicles was assayed for the concentration of IGF-I, IGFBP, progesterone, and estradiol. The length of the conceptus and the total amount of IGF-I in uterine fluid were similar for rbST and control. Recombinant bST increased 1) the weight of the CL, 2) the number of largest follicles (10 to 15 mm in diameter), 3) the concentration of IGF-I in the follicular fluid, 4) the follicular fluid content of IGFBP of the largest estrogenic follicle, and 5) the quantity of IGFBP in uterine flushings. The concentration...Continue Reading

References

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Citations

Oct 20, 1999·Domestic Animal Endocrinology·D R Deaver, K A Bryan
Nov 5, 2011·Biological Chemistry·Lorenzo CastigliegoAlessandra Guidi
Nov 2, 2001·Anatomia, histologia, embryologia·G G KaiserG A Palma
Aug 18, 2009·Theriogenology·M A VelazquezH Niemann
Jan 6, 2009·Animal Reproduction Science·G E Mann
Mar 8, 2012·Reproduction, Fertility, and Development·Matthew C Lucy
Jul 6, 2000·Journal of Dairy Science·F MoreiraW W Thatcher
Feb 7, 2009·Physiology·George Osol, Maurizio Mandala
Jun 1, 1997·American Journal of Reproductive Immunology : AJRI·F W BazerT L Ott
Jun 6, 2014·The Veterinary Record·J R Newcombe, G M M Kelly
Jun 24, 2004·American Journal of Reproductive Immunology : AJRI·Peter J HansenRoger P Natzke

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