estrus detection, mares, reproductive cycles
Agricultural and Biosystems Engineering
In a successful horse-breeding program, it is im¬portant to understand the reproductive cycles and be¬haviors of a mare. The reproductive cycle of a mare is called the estrous cycle and lasts an average of 21 days from one ovulation to the next. Estrus is a period of time within the estrous cycle when the mare is recep¬tive to being bred and typically lasts from 5 to 8 days. The efficiency of your breeding program can be af¬fected by your ability or inability to detect estrus in a mare. When a mare is in estrus, it is often referred to as being in “heat” or standing to be bred. Today there are a wide variety of methods used for detection of estrus in the mare. Before discussing the methods and signs of estrus, some background information about the es¬trous cycle must be given. Developing a thorough un¬derstanding of estrus and the estrous cycle in the mare during the breeding season is crucial for improving current breeding practices.
Sandager, Brianna and Bott, Rebecca, "Estrus Detection in Mares" (2011). SDSU Extension Extra Archives. 100.