Crinone Progesterone Gel 4% Single Tubes 1.125 gm x 6/Box (RX)Crinone Progesterone Gel 4% is a medication used to supplement progesterone in women who are receiving hormone replacement therapy or who are undergoing fertility treatments. It is a synthetic form of the natural hormone progesterone and is applied topically in the form of a vaginal gel. Crinone helps to support a healthy uterine lining and maintain pregnancy in women who have low levels of progesterone. It is prescribed by a doctor and can be used