title: First experience with intracytoplasmic sperm injection for extreme oligozoospermia associated with Crohn's disease and 6-mercaptopurine chemotherapy.
abstract: OBJECTIVE
  To describe the reproductive outcome following intracytoplasmic sperm injection (ICSI) for male factor infertility associated with Crohn's disease and 6-mercaptopurine (6-MP) chemotherapy.
  
  
  METHODS
  The male partner of a couple suffered from severe Crohn's disease and received a 3-month course of 6-MP for this condition. Two spontaneous conceptions were established before 6-MP, although post-chemotherapy semen analysis found the sperm concentration to be 8,000/mL. In vitro fertilization (IVF) with ICSI and embryo transfer was performed.
  
  
  RESULTS
  The woman underwent an uncomplicated controlled ovarian hyperstimulation sequence using a combined rec-FSH+hMG protocol, following late luteal phase pituitary downregulation. This culminated in the retrieval of 18 oocytes, 11 of which were fertilized with ICSI. She later delivered a normal male infant without urogenital anomaly. Four nontransferred blastocysts were cryopreserved.
  
  
  CONCLUSIONS
  This report describes the first successful birth after ICSI for severe oligozoospermia associated with Crohn's disease and 6-MP therapy. We outline salient features of Crohn's disease, 6-MP pharmacology, and their relevance to human fertility.
authors.affiliation: Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Atlanta Medical Center, Atlanta, GA 30342, USA. dr.sills@ivf.com
authors.forename: E Scott
authors.initials: ES
authors.lastname: Sills
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Tucker
mesh_terms: D000328:Adult; D003424:Crohn Disease / Q000150:complications* / Q000188:drug therapy; D005260:Female; D006801:Humans; D007166:Immunosuppressive Agents / Q000008:administration & dosage; D008297:Male; D015122:Mercaptopurine / Q000008:administration & dosage; D009845:Oligospermia / Q000150:complications* / Q000628:therapy*; D011247:Pregnancy; D011256:Pregnancy Outcome; D020554:Sperm Injections, Intracytoplasmic
chemical_list: D007166:Immunosuppressive Agents; D015122:Mercaptopurine