<unk>  is a progestin and endocrine-metabolic agent that is FDA approved for the treatment of indicated to reduce the risk of preterm birth in women with a singleton pregnancy who have a history of singleton spontaneous preterm birth.   Common adverse reactions include injection site reactions, pain, swelling, pruritus, nodule, urticaria, nausea, and diarrhea.
Hydroxyprogesterone caproate
Medroxyprogesterone acetate 
Desoxymethyltestosterone
Leuprolide
Gestodene
Proligeston
Sermorelin
Levonorgestrel 