Answer: estrual

AnswerCrossword Clue
estrualseries of physiological changes in sexual and other organs in female mammals, extending from one period of heat to the next, accompanied by behavioral changes indicating interest in mating
estrualpertaining to estrus, a period of sexual excitement and ovulation in animals also ESTROUS, OESTRUAL
estrualthe period of heat or rut; the period of maximum sexual receptivity of the female