[Hyperemesis in the first trimester of pregnancy: role of biological hyperthyroidism and fetal sex].

Objectives: Our objectives were to link hyperemesis gravidarum with biochemical hyperthyroidism and hormonal modification (HCG and estradiol) and to test the hypothesis that biological abnormalities (ionogram and liver enzyme) are more often reported in hyperemesis gravidarum with biochemical hyperthyroidism.

Study Design: Thirty three patients admitted in "Hôpital Jeanne de Flandre" with hyperemesis gravidarum were studied prospectively.

Results: Twenty-two patients (66.