First- and second-trimester hemoglobin levels. Relation to birth weight and gestational age.
The computerized records of 3074 women who were delivered during the period 1987-1990 were analysed. We studied possible relations of birth weight and gestational age to maternal first- and second-trimester hemoglobin levels. Birth weight and gestational age were taken as outcome variables in a multiple stepwise regression analysis, including factors that might interact with hemoglobin levels. A strong independent inverse correlation between the lowest second-trimester hemoglobin and birth weight was observed. First-trimester hemoglobin levels explained little with regard to birth weight, but had a small negative correlation to gestational age. For gestational age < 259 days we found a strong positive correlation between the first- to second-trimester decrease in hemoglobin and birth weight.
Rasmussen
S
S
Department of Obstetrics and Gynecology, University of Tromsø, Norway.
Oian
P
P
D001724:Birth Weight; D005260:Female; D006454:Hemoglobins / Q000032:analysis*; D006801:Humans; D007231:Infant, Newborn; D007236:Infant, Small for Gestational Age; D011247:Pregnancy / Q000097:blood*; D011261:Pregnancy Trimester, First / Q000097:blood; D011262:Pregnancy Trimester, Second / Q000097:blood; D012044:Regression Analysis
D006454:Hemoglobins