Question

For ovulation in reflex ovulators
A. Coitus is necessary.
B. Coitus is not necessary.
C. Oxytocin is to be released.
D. Prolactin is secreted beforehand.

Answer 1

The release of ovum from the ovary is known as ovulation. It occurs on the 14th day of menstrual cycle. Luteinising hormone commonly known as LH induces ovulation. Reflex ovulators include the process of induced ovulation . The reflex ovulators lack estrous cycles.

Complete answer: Induced ovulation is usually defined as when a female animal ovulates due to an external given stimulus. This stimulus is given either during, mating, or just prior to mating , rather than ovulating cyclically (that is estrous cycle) . External Stimuli that cause induced ovulation include the physical act of coitus or mechanical stimulation .
Now let us match this with the given options:-
Coitus is necessary :- external stimuli in induced ovulation is necessary and it is provided by mating that is coitus . Hence this process is necessary and the option is correct.
Coitus is not necessary. external stimuli in induced ovulation is necessary and it is provided by mating that is coitus . Hence coitus is most important so the option is not correct.
Oxytocin is to be released.:- oxytocin is a hormone which is released during the birth of the baby thus it is not needed for ovulation. Hence this option is not correct.
Prolactin is secreted before hand:- it is a milk producing hormone and not needed for ovulation. Hence this option is not correct.

Our required answer is a, that is coitus is necessary.

Note: Estrous Cycle : The estrous cycle consists of cyclic changes in the female reproductive system of non-primate mammals. There is no menstruation at the end of the estrous cycle. The oestrogen level in blood increases resulting in a strong sex urge in the female. This is called the "period of heat". The estrous cycles run only during breeding season. This cycle is absent in reflex ovulators.