The given graph shows the hormonal changes during a normal menstrual cycle. What would be a likely consequence if the hormone represented by Q in the given graph is lacking in an adult female?

Options

A. The uterine lining might not be sufficiently stable for implantation of fertilised ovum.
B. Levels of the hormone represented by graph P would be higher than normal
C. Fertilisation of ovum would fail to occur.
D. There would be no significant effect since the functions of the hormones overlap.

Answer

A

Explanation

In the given graph, P represents changes in estrogen level and graph Q represents changes in progesterone level during a normal menstrual cycle. Progesterone is required for the maintenance of uterine lining which is needed to implant the fertilised ovum. Thus, if progesterone is lacking in an adult female, her uterine lining might not be stable to support an implanted embryo.