Human chorionic gonadotropin in maternal serum in relation to fetal gender and utero-placental blood flow.

Background: To investigate whether fetal gender differences in human chorionic gonadotropin (hCG) in maternal serum and the presence of hCG receptors in the wall of the uterine arteries influence the utero-placental blood flow.

Method And Material: Sixty-six healthy women with singleton uncomplicated pregnancies were examined at 8-10, 16-19 and 31-37 weeks of gestation. The pulsatility index (PI) was measured in the uterine arteries, simultaneously with sampling of peripheral maternal blood for hCG determination.

Human chorionic gonadotropin and testosterone in normal and preeclamptic pregnancies in relation to fetal sex.

Objective: The aim of the present study was to evaluate the effects of fetal gender on serum human chorionic gonadotropin (hCG) and testosterone in normotensive and preeclamptic pregnancies.

Methods: The study consisted of 137 women with singleton pregnancies in the third trimester. Seventy-three pregnancies were uncomplicated; among those were 35 male and 38 female fetuses.