Which term is commonly used to describe a female in estrus?

• A. Estrus
• B. Standing heat
• C. Heat cycle
• D. Pregnant

Answer: (B)

Standing heat is the term commonly used to describe a female in estrus. This phrase captures the observable behavior breeders look for: a female that will stand still to be mounted by a male, indicating she is receptive to mating. Estrus refers to the reproductive phase itself, not the behavior you observe; a heat cycle describes the entire cycle over time, including non-receptive phases; pregnant means the female is carrying offspring and is not in estrus. So the language “standing heat” directly conveys the moment of receptivity that is key for timing breeding.