Many factors contribute to child bearing; however, a hormone imbalance can also be responsible for the inability to conceive a child. A luteal phase defect is one such cause of infertility, which is a symptom of reduced progesterone levels in the body. Supplementing progesterone can promote the uterine wall as it gets ready for implantation of a fertilized egg and support the fetus throughout pregnancy. As a result of this process, therapy can restore the body’s hormone levels and promote a woman’s ability to conceive. Progesterone levels during pregnancy are essential as well as an imbalance may impact support of the fetus and miscarriage.