Pregnancy after intracytoplasmic sperm injection with sperm from a man with a 47,XXY Klinefelter's karyotype.

OBJECTIVE: To report the initiation of a pregnancy that was achieved by intracytoplasmic sperm injection (ICSI) with sperm from a patient with Klinefelter's syndrome.

DESIGN: Case report.

SETTING: University women's hospital IVF center.

PATIENT(S): A couple with primary infertility and nonmosaic 47,XXY karyotype of the male partner.

INTERVENTION(S): Intracytoplasmic sperm injection after ovarian stimulation and transvaginal ultrasound-guided oocyte pick-up with sperm from a hypergonadotropic man with a nonmosaic 47,XXY karyotype.

MAIN OUTCOME MEASURE(S): Clinical pregnancy.

RESULT(S): Despite a 47,XXY karyotype in all 50 analyzed lymphocyte metaphases, the sperm of the patient led to a clinical pregnancy with the first attempt of ICSI and intrauterine transfer of three embryos. The pregnancy stopped developing in the ninth week. Cytogenetic investigation of the abortion material revealed a numerical normal 46,XXY karyotype.

CONCLUSION(S): Sperm from a patient with hypergonadotropic nonmosaic Klinefelter's syndrome, when used for ICSI, can lead to a pregnancy.