RESUMO
OBJECTIVE: To determine whether unexplained elevation of maternal serum alpha-fetoprotein(MSAFP) is associated with adverse outcomes in pregnancies complicated by placenta previa. METHODS: One hundred and five pregnant women with placenta previa between January 1995 and March 1999 were included in this study. They underwent the triple test at 14 to 22 gestational weeks. These 105 pregnant women were stratified into two groups by MSAFP at 2.0MOM. The outcomes of pregnancy in high MSAFP(>or=2.0MOM) group were compared with those in normal MSAFP(or=2.0 MOM). Eleven out of 632 pregnant women with high MSAFP were having placenta previa. 3. The incidence of preterm birth was significantly high in high MSAFP group with placenta previa.(p<0.001) 4. Women with unexplained elevated MSAFP and having placenta previa showed the increased risk for preterm delivery (p<0.05), preeclamsa (p<0.001), and bleeding in third trimester (p<0.001), but not placenta accreta, placenta abruption, cesarean hysterctomy and intrauterine fetal death. CONCLUSION: We concluded that unexplained elevated levels of midtrimester MSAFP in complicated placenta previa were associated with the elevated risk of preterm delivery, preeclamsia and bleeding in the early third trimester, but not placenta accreta, placenta abruption, cearean hysterectomy and intrauterine fetal death.