The effect of progesterone implants on ovulation and plasma levels of LH, FSH and progesterone in anoestrous ewes.
The effects of 100-mg progesterone implants in anoestrous ewes on plasma progesterone and gonadotrophin levels are described. Implant removal resulted in a surge of plasma gonadotrophins and ovulation, but there was no evidence of behavioural oestrus in 90% of the ewes. These results are discussed.
D000780:Anestrus; D000818:Animals; D004343:Drug Implants; D004971:Estrus; D005260:Female; D007986:Luteinizing Hormone / Q000097:blood*; D010060:Ovulation / Q000187:drug effects*; D011247:Pregnancy; D011374:Progesterone / Q000008:administration & dosage / Q000097:blood*; D012701:Serotonin / Q000008:administration & dosage / Q000494:pharmacology*; D012756:Sheep; D012826:Silicone Elastomers; D014844:Vulva / Q000187:drug effects
D004343:Drug Implants; D012826:Silicone Elastomers; D012701:Serotonin; D011374:Progesterone; D007986:Luteinizing Hormone