A rare case of a patient with conservatively treated endometrial carcinoma who conceived and delivered a healthy baby after the transfer of embryos with intracytoplasmic sperm injection (ICSI) and preimplantation genetic diagnosis (PGD) is presented. A 41-year-old woman had an office hysteroscopy in the infertility work-up and stage I endometrial adenocarcinoma was diagnosed. After conservative treatment, the patient underwent ICSI and PGD. She achieved pregnancy with two normal embryos. Two gestational sacs were observed but one of them was blighted. The patient subsequently delivered a healthy female infant. Repeated office hysteroscopy and endometrial sampling was performed after delivery. The appearance of the endometrium was normal on hysteroscopy, and the histology report was normal. The principal concern with medical therapy is that the lesion cannot be fully evaluated until the hysterectomy is performed, the nodes palpated, and the uterus is sectioned. The patient was referred to a gynaecological oncologist for definitive surgery.