A 35 year old woman presents with history of periods of amenorrhea followed by heavy bleeding and denies using drugs. She wants to get pregnant. The following are likely causes: a) Over stimulation of the follicular system of the ovaries by the Hypophysis. b) Under production of oestrogens and progesterone c) Under production of FSH and LH d) All the above e) None of the above

The woman's symptoms of periods of amenorrhea followed by heavy bleeding could be due to a number of factors.

a) Over stimulation of the follicular system of the ovaries by the Hypophysis: This could potentially cause irregular periods and heavy bleeding. The Hypophysis (pituitary gland) releases hormones that stimulate the ovaries to produce eggs. If this system is overstimulated, it could lead to an overproduction of eggs, which could cause irregular periods and heavy bleeding.

b) Under production of oestrogens and progesterone: These hormones are crucial for regular menstrual cycles. If they are underproduced, it could lead to irregular periods and heavy bleeding.

c) Under production of FSH and LH: These hormones stimulate the ovaries to produce eggs. If they are underproduced, it could lead to irregular periods and heavy bleeding.

So, the answer is d) All the above. All these conditions can cause irregular periods and heavy bleeding, and could potentially affect a woman's ability to get pregnant.