Variations in plasma growth hormone concentrations in laying hens.
1. Variations in plasma concentrations of growth hormone (GH) and luteinising hormone (LH) were measured by radioimmunoassay in blood samples taken during the ovulatory cycle of the domestic hen. 2. A peak in LH concentrationas observed 4 h prior to ovulation. 3. Plasma GH concentrations were quite variable but a significant increase was observed between 2 h before and 2 h after ovulation and the concentration remained elevated for about 4 h thereafter.
D000818:Animals; D002645:Chickens; D002940:Circadian Rhythm; D005260:Female; D013006:Growth Hormone / Q000097:blood*; D007986:Luteinizing Hormone / Q000097:blood; D010058:Oviposition; D011863:Radioimmunoassay
D007986:Luteinizing Hormone; D013006:Growth Hormone