What is the term commonly used to describe a female in estrus?

• A. Estrus
• B. Standing heat
• C. Heat cycle
• D. Breeding season

Answer: (B)

Standing heat describes the behavior of a female that is sexually receptive and will stand to be mounted by a male. This term is used in breeding contexts because it conveys what you can observe in the animal—the ready-to-mate state—more clearly than the other phrases. Estrus is the physiological phase during which receptivity occurs, but the phrase standing heat specifically highlights the observable, standing behavior breeders look for to time mating. The heat cycle refers to the entire cycle, and the breeding season is a broader time period when breeding may occur, not the immediate state of receptivity.