Elevated day 3 serum follicle stimulating hormone and/or estradiol may predict fetal aneuploidy

Objective: To determine whether baseline serum FSH and/or E-2 concentration s can predict the risk for fetal chromosomal abnormalities. Design: Case control study. Setting: Reproductive technology program at a university hospital. Patient(s): Patients who underwent dilation and curettage (D + C), and whos e products of conception were karyotyped. Intervention(s): Patients underwent natural conception or controlled ovaria n hyperstimulation followed by intrauterine insemination, in vitro fertiliz ation and embryo transfer, gamete intrafallopian transfer, or zygote intraf allopian transfer. Main Outcome Measure(s): Baseline serum FSH and E-2 concentrations and feta l karyotype. Result(s): Genetic evaluation of 78 D + C specimens revealed 34 normal and 34 abnormal fetal karyotypes. A significantly greater proportion of women w ith abnormal fetal karyotype had elevated baseline serum FSH (greater than or equal to 15 mIU/mL [RIA] or 10 mIU/mL [Immulite]) and/or E-2 (greater th an or equal to 50 pg/mL [Immulite]) compared with women of normal fetal kar yotype. Among karyotypically abnormal abortuses, autosomal trisomy was the most common abnormality noted (79.5%), followed by mosaicism (6.8%), triplo idy (6.8%), monosomy XO (4.5%), and balanced translocation (2.3%). Conclusion(s): Baseline serum FSH and/or E-2 concentrations may be valuable as predictors of fetal aneuploidy. (C) 1999 by American Society for Reprod uctive Medicine.