Effect of Heat Stress on Plasma Concentrations of Prolactin and Luteinizing Hormone in Ewes

Abstract
Basal concentrations of prolactin but not luteinizing hormone were elevated in ewes by 8-10 h of heat stress given daily during the first 11 days of their estrous cycle. The prolactin and luteinizing hormone responses to thyrotropin releasing hormone and gonadotropin releasing hormone were unaffected.