After pregnancy a woman will no longer ovulate. During pregnancy the ovaries no longer undergo their cycle and no follicles develop, so there are no mature follicles. After pregnancy, endocrine changes occur in the body, and estrogen and progesterone increase, which maintain the development and growth of the fetus in the body. After pregnancy, women will experience breast duct expansion, nipple development, and breast development. These symptoms include enlargement of the breasts, darkening of the nipples, or deepening of the areola.