Reproductive endocrinology and infertility
Endocrinology of Reproductive Endocrinology and Infertility (REI) is an obstetrics and gynecology surgeon who trains reproductive medicine physicians to study hormonal functions associated with reproductive and infertility issues. While most REI specialists focus primarily on the treatment of infertility, reproductive endocrinologists are trained to test and treat hormonal dysfunction in women and men other than infertility. Reproductive endocrinologists have completed training in obstetrics and gynecology (obgyn) before pursuing subspecialty (fellowship) at REI. Reproductive surgery is a related specialty that further specializes in surgery for anatomical disorders that affect childbirth by gynecologists or urologists.