ABSTRACT
The purpose of this study was to examine whether women with first trimester uterine
bleeding and low serum folate have a higher incidence of spontaneous abortions and
adverse perinatal outcome compared with women whose folate levels are normal. Serum
folate and vitamin B12 levels were obtained on 225 women who presented with first trimester vaginal bleeding;
pregnancy outcomes of those whose folate or vitamin B12 levels were low were compared with those with normal levels using the chi-square
test. Of the 151 women included, 52 had low folate levels (less than 4.0 ng/ml). Their
spontaneous abortion rate and perinatal outcomes were similar to those whose folate
levels were normal. We concluded that in pregnancies complicated by first trimester
vaginal bleeding, low folate levels do not appear to be associated with an increased
risk of pregnancy loss and adverse outcome.