[Increase of hemoglobin concentration in blood during the second trimester of pregnancy in relation to later pregnancy complications such as hypertension and intrauterine fetal growth inhibition].

The concentration of haemoglobin was determined during the second trimester of pregnancy in a group of 375 women. The mean haemoglobin concentration was significantly higher in women in whom during the third trimester of pregnancy. pregnancy-induced hypertension developed (p < 0.01). Similarly, the mean haemoglobin concentration during the second trimester of pregnancy was higher in women in whom intrauterine fetal growth inhibition was found during the third trimester. The highest haemoglobin concentration during the second trimester of pregnancy was observed in women in whom pregnancy-induced hypertension developed during the third trimester, together with intrauterine fetal growth inhibition.