Question

The limited period of sexual receptivity that occur around the time of ovulation in all female mammals, except human, is called

• A. Oogenesis
• B. Menstruation
• C. Estrus
• D. Puberty

Answer 1

Answer: (C)

Estrus

Estrus is the period in the sexual cycle of female mammals, except humans during which they are in heat, i.e ready to mate. Prior to ovulation, the endometrium (uterine lining) thickens, in preparation for holding the fertilized ova. As the proliferation of uterine tissue reaches its peak, receptivity is the highest which is called the oestrous period. The period of sexual receptivity is primarily initiated by the elevation in estrogens from mature follicles just prior to ovulation. The basic pattern of the oestrous cycle is the same in all domestic animals, but some specific differences are found in specific parts of the cycle.

So the correct option is 'estrus'.