A. PCO :
PCOS (Polycystic Ovarian Syndrome) refers to a condition caused by hormonal imbalances and metabolic problems. The fact that PCOS affects fertility can be a major concern for females at reproductive age. But that does not mean if you are suffering from PCOS, you can't get pregnant. The disorder is one of the most common, but treatable, causes of infertility. In women suffering from PCOS faces hormonal imbalances which interfere with the process of ovulation that involves growth and release of eggs from the ovaries. If the ovulation is not in order you may have hard times getting pregnant.
B. Thyroid Problem
C. High Prolactin Level
D. Diabetes