Birth control pills contain synthetic estrogen and progesterone. How might these hormones prevent pregnancy?
They cause the corpus luteum to degenerate.
They keep the pituitary from secreting FSH and LH, so ovulation does not occur.
They cause the lining of the uterus to be sloughed off.
They trigger premature ovulation, before an egg is mature.
According to the NCERT text, oral contraceptives (pills) work by inhibiting ovulation and implantation. Physiologically, high levels of these hormones (progestogens or progestogen-estrogen combinations) exert negative feedback on the pituitary gland, suppressing the secretion of Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH), which are necessary for follicle maturation and the LH surge that triggers ovulation , .
Join thousands of students and practice with AI-generated mock tests.