How do fertility drugs like Clomid (clomiphene) work to help conception?

Ovulation. Fertility drugs help to ovulate or ovulate more than one egg. Of course one has to make sure sperm count is normal and the fallopian tubes are open.
Estrogen block. Clomiphene blocks the receptors for estrogen in the pituitary gland. As a result, the pituitary releases hormones to stimulate the ovaries. Ovulation results.