Reproductive characteristicsMore than half of the pregnant women were in their second trimester (51.2%), were multigravida (61.4%) and were multiparous (54%). Histories of stillbirth, spontaneous abortion, and fetal death were reported by 8.8%, 17.5% and 5.7% of participants, respectively. The seropositivity rate of antirubella IgM was higher among women who were in their first trimester (4.2%), primi-gravida (3.7%) and nulliparous (3.1%). A higher rate of antirubella IgG was observed among primigravida women (89.6%), nulliparous (89.2%) and those in their third trimester (88.2%). In bivariate analysis, none of these factors was found to be significantly associated with either IgM or IgG seropositivity status (table 2).