The main causes of stillbirth were malformation, pregnancy complication and umbilical cord events.
畸形、妊娠并发症和脐带相关事件是造成死胎的主要原因。
2
The main reason of perinatal death were umbilical cord factors, fet al malformation, preterm labor, placental factor, oligohydramnios, severe preeclampsia and pregnancy complicated syphilis.