Infa HCG 5000 Injection 1's is used in the treatment of female infertility, male hypogonadism and cryptorchidism. It contains Human chorionic gonadotrophin, which stimulates the production of sex hormones such as testosterone in men and progesterone in women. It can stimulate ovulation (egg production) in women and improve sperm production in men. It may cause common side effects such as pain at the injection site, headache, irritability, restlessness, depression, fatigue, oedema (swelling), early puberty and gynecomastia (swelling of breast tissue in men). Before taking this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.