This study is planned to evaluate the efficacy and tolerability of subcutaneous administration of progesterone compared with vaginal progesterone for luteal phase support in cycles IVF / ICSI in referring patients to the Royan Institute. A randomized controlled clinical trial is conducted during 1393 to 1394 in the Royan Institute. After ovum pick up, eligible women were randomly allocated into two groups (group A and B). luteal phase support is done in two ways: subcutaneous injection of progesterone (Prolutex) and vaginal suppository. In the Group A (n = 70), since ovum pick up day, a daily subcutaneous injections of progesterone (25 mg) (Prolutex®; IBSA Institut, SA Biochimique) will be used and in the Group B (n= 70), one vaginal suppository will be used (Cyclogest ®; Actavis, Barnstaple, UK), If pregnancy is occurred it continues until 10 weeks of pregnancy. Sixteen days after embryo transfer, as well as 6 and 10 weeks of pregnancy, possible side effects (gastrointestinal, skin, and local), pain and discomfort during use of the drugs will follow by the designed questionnaire and will be recorded. Side-effect, clinical pregnancy and abortion rates will be compared between two groups by appropriate statistical tests.