NEETZoologyHuman Reproduction
Read the following statements regarding the menstrual cycle in human females and select the incorrect statement.
Options
- AThe first menstruation begins at puberty and is called menarche.
- BDuring pregnancy, all events of the menstrual cycle continue but menstruation does not occur.
- CIn human beings, menstrual cycles cease around 50 years of age, which is termed as menopause.
- DCyclic menstruation is an indicator of the normal reproductive phase and extends between menarche and menopaus
Correct answer
B. During pregnancy, all events of the menstrual cycle continue but menstruation does not occur.
Step-by-step solution
During pregnancy, all events of the menstrual cycle stop and there is no menstruation. The high levels of progesterone and estrogens during pregnancy exert negative feedback on the pituitary, preventing the maturation of new follicles and ovulation. Therefore, the statement claiming that all events of the menstrual cycle continue during pregnancy is incorrect. The other statements are correct as per NCERT: menarche is the first menstruation at puberty, menopause is the cessation of the cycle around 50 years of age,