Currently, conventional medical therapy plays a role only in treating endometriosis-associated infertility in assisted reproductive technology (ART); it was demonstrated that pretreatment with GnRH agonist for 3–6 months before initiation of in vitro fertilization (IVF) or intracytoplasmic sperm injection could improve the pregnancy rate 4-fold [16]. The gene discussed is GNRH1; the disease is endometriosis.