Siphene 100 mg is a brand name for the generic drug clomiphene citrate. It is given in tablets for the treatment of women whose ovaries do not function efficiently enough to allow for pregnancy. In most cases, the best results are seen in women who suffer from polycystic ovary syndrome, a disorder which prevents women from ovulating every month, as well as other conditions which prevent women from ovulating. Once regular ovulation has been established, treatment includes proper timing of sexual intercourse and beginning each new course of Siphene 100mg on the fifth day of the cycle.