Maternal serum free beta-hCG levels in uncomplicated pregnancies at the 10th-15th week of gestation and the development of obstetric complications.

Objective: To determine if free beta-human chorionic gonadotropin (hCG) serum levels at the 10th-14th week of gestation were different in groups of women who had experienced pregnancy complications.

Study Design: The obstetric records of women who had uncomplicated pregnancies when they consented to donate blood for biochemical research purposes early in pregnancy were reviewed. Two hundred thirteen of these women had donated blood at the 10th-14th week of gestation.