: Cattle are polyestrous, meaning they cycle continuously throughout the year if not pregnant. The average cycle lasts 21 days and is divided into four distinct phases:
: The CL regresses if no pregnancy is detected, and the body prepares for a new heat cycle. Bovine Reproduction
: The cow is in heat and sexually receptive to the bull. : Cattle are polyestrous, meaning they cycle continuously
: The corpus luteum actively produces progesterone to maintain a potential pregnancy. : Cattle are polyestrous
To manage and improve herds, producers rely on several heavily researched breeding methods: Bovine Reproduction - Taylor & Francis
: Ovulation occurs, and the corpus luteum (CL) begins to form.