The in males and the in females are permanently blocked when an individual undergoes a sterilization procedure.

it's c. (to reduce the greenhouse effect/carbon gasses)

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.