PMID: 1206273Nov 1, 1975Paper

A comparison of variations in plasma luteinizing hormone concentrations in male and female domestic chickens (Gallus domesticus) from hatch to sexual maturity

The Journal of Endocrinology
P J Sharp

Abstract

Changes in plasma LH concentrations were followed in chickens of both sexes from hatch to sexual maturity using a radioimmunoassay. Mean levels of LH were lower in the females than in the males at all stages of development. These levels rose rapidly in both sexes during the first week after hatch to maxima of 6-5 +/- 1-2 (S.E.M.) ng/ml (n = 6) in the males and 4-6 +/- 0-6 ng/ml (n = 6) in the females. Thereafter levels of the hormone in the circulation stabilized in the males but fell over a period of 1 or 2 weeks in the females to 2-5-3 ng/ml. Plasma LH levels started to rise steeply in both sexes when they were between 16 and 19 weeks old at the same time as there was an increase in the rate of comb growth. Afterwards in six of the males studied in detail the mean plasma LH level rose significantly (P less than 0-01) over a period of 5-8 weeks from 8-1 +/- 1-2 to 13-2 +/- 1-9 ng/ml. In a parallel study on six females the rate of LH secretion increased for approximately 3 weeks and then decreased for about the same period forming a prepubertal LH peak. The first eggs were laid between 22 and 25 weeks of age when mean plasma LH levels had fallen to about 1-8 ng/ml. The mean plasma LH level in these hens when they were laying (1...Continue Reading

Citations

Jun 1, 1989·Physiology & Behavior·N SayagV E Grimm
Apr 30, 2004·British Poultry Science·P D LewisS Leeson
Jul 30, 2005·British Poultry Science·P D LewisR M Gous
Sep 1, 1977·British Poultry Science·S HarveyC G Scanes
Nov 1, 1977·British Poultry Science·P M Godden, C G Scanes
Nov 14, 2007·The Journal of Reproduction and Development·Manila SedqyarKazuyoshi Taya
Feb 2, 2008·The Journal of Reproduction and Development·Manila SedqyarKazuyoshi Taya
May 4, 2010·Animal Reproduction Science·María Genoveva González-Morán, Elizabeth Soria-Castro
Feb 1, 1978·General and Comparative Endocrinology·F E Wilson, B K Follett
May 1, 1983·General and Comparative Endocrinology·J E WoodsR C Thommes
Jan 1, 1978·General and Comparative Endocrinology·C G ScanesN J Bolton
Jan 1, 1982·General and Comparative Endocrinology·M Reyss-BrionA Guichard
Nov 24, 2005·Domestic Animal Endocrinology·Helena Elzbieta Paczoska-EliasiewiczArieh Gertler
Sep 13, 2005·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·Veerle BruggemanEddy Decuypere
May 21, 2016·Scientific Reports·Satoshi IshishitaYoichi Matsuda
Feb 1, 1987·Zentralblatt für Veterinärmedizin. Reihe A·S Kajal, R P Moudgal
Jun 1, 1982·Zentralblatt für Veterinärmedizin. Reihe A·J NiezgodaS Bobek

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