This study focuses on Infertility, a condition where a person has difficulty conceiving a child. The research involves women who have undergone intrauterine insemination, a procedure where sperm is placed directly inside the uterus to help with fertilization, following treatment with letrozole, a medication used to stimulate the ovaries. The main goal is to determine if adding progesterone, a hormone that helps prepare the lining of the uterus for pregnancy, can improve the chances of a successful pregnancy.

Participants in the study may receive either Cyclogest, which is a form of progesterone delivered as a pessary through vaginal use, or a placebo. The luteal phase refers to the period in the menstrual cycle after ovulation occurs and before the next period begins, a time when hormone levels are critical for supporting a developing pregnancy. By comparing these two groups, the study aims to see how supplementation affects outcomes such as pregnancy rates and various health factors during pregnancy and birth.