Hormonal
Hormonal imbalances can affect fertility in both males and females.
An irregular balance of hormones associated with reproductive health in one or both partners can make conception difficult.
Hormones play an important role in reproduction, particularly the hormones that control the menstrual cycle and the development of sperm. Women who do not ovulate at all is caused by hormonal imbalances, where male hypogonadism is a condition where the body does not produce enough of the testosterone hormone; both of which are causes of infertility.