Open AccessHuman Chorlonlc Gonadotropin in Cord Blood and Peripheral Maternal Blood in Singelton and Twin Pregnancies at Delivery
Author(s) -
Steier Johan Arnt,
Myking Ole L.,
Ulstein Magnar
Publication year - 1989
Publication title -
acta obstetricia et gynecologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.401
H-Index - 102
eISSN - 1600-0412
pISSN - 0001-6349
DOI - 10.3109/00016348909006140
Subject(s) - medicine , cord blood , obstetrics , human chorionic gonadotropin , singleton , fetus , gonadotropin , pregnancy , twin pregnancy , peripheral blood , umbilical cord , gynecology , endocrinology , hormone , immunology , biology , genetics
The influence of fetal sex on human chorionic gonadotropin IhCG) in cord and peripheral maternal blood was studied at delivery in 57 twin and 66 singleton uncomplicated pregnancies. In twin pregnancies the hCG levels were about twice as high in female‐female and in female‐male vis‐à‐vis male‐male combinations in both maternal and cord blood. In singleton pregnancies the hCG levels were significantly higher in maternal and in cord blood in cases of female vis‐his male infants. The ratio of maternal hCG/placental weight was also highest in the twin pregnancies when one or both infants were female. This suggests a “female effect”, possibly genetically based.