ObjectiveTo analyze the distribution characteristics and influencing factors of high-risk pregnancies in Wenzhou before and after the universal two-child policy, and to provide reference for reducing maternal and perinatal mortality.

MethodsBy the method of retrospective investigation and analysis, the data from the information management system of maternal and child health care in Wenzhou City from January 1, 2014 to Dec 31, 2017 was analyzed.

ResultsThe average incidence of high-risk pregnancies in Wenzhou City from 2014 to 2017 was 40.30%, showing an upward trend year by year.The incidence of high-risk pregnancy of registered mothers was higher than that of migrant mothers(χ²=1 852.86, P < 0.001).And 56.38% of the high-risk pregnancies were moderate to mild.The abnormal body weight (index) in the early pregnancy was the leading risk factor (14.71%), and 48.31% of the pregnant women had more than two high-risk factors.The average incidence of severe high-risk pregnancy was 1.25%, which showed an upward trend.However, the incidence of severe high-risk pregnancy in migrant mothers was higher than that in household registered mothers, and the difference was statistically significant.The top six risk factors were eclampsia (pre-eclampsia), central placenta previa, placental abruption, combined with serious medical diseases, pregnancy complicated with viral hepatitis and liver damage, and pregnancy complicated with thrombocytopenia.

ConclusionAttention should be paid to the detection of high-risk pregnancy factors, and standardized management and services should be strengthened to reduce maternal and perinatal mortality thus ensuring maternal and infant safety.