Question

Which of the following is an indicator of the normal reproductive phase in a human female?

• A. Menstruation cycle
• B. Estrous cycle
• C. Ovulation
• D. Implantation

Answer 1

The correct option is A Menstruation cycle

The period between the onset of menstruation and its permanent cessation is the reproductive lifespan of a human female. This can also be referred to as the reproductive phase of the individual. The reproductive phase in most species is regulated by regular hormonal changes or cycles. In the majority of the primates, it is called the menstrual cycle and in the majority of the non primates, it is called an estrous cycle. Since we are discussing a human female, the menstrual cycle is an indicator of the normal reproductive phase.
Ovulation is not necessarily an indicator of normal reproductive phase. It is a part of the menstrual cycle, but in few females, it may so happen that there is an absence of ovulation, though the menstruation occurs. It is called an ovulatory period. It happens in the initial 2 years and is considered normal, since it is temporary and can be overcome.
Implantation is also not necessarily an indicator of normal reproductive life.