Regular measurements of progesterone in milk were made to monitor ovarian activity in over 300 commercial dairy cows from partiurition until pregnancy established. Six animals (approximately 1-5 per cent) which had not previously been inseminated showed prolonged luteal activity lasting for over 30 days. No apparent uterine abnormalities or infections were found in these cases. Prostaglandin analogue cloprostenol (Estrumate ICI) given intramuscularly induced complete luteolysis in treated animals. The subsequent fertility varied, but at least three of the six cows conceived again.
Statistics from Altmetric.com
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.