Table 1. Risk factors causing PPH according to Chinese domain experts.

Category	Risk factors
1.Present Gestation	General condition
	Mental status
	Age
	Gestational age
	Vaginal discharge before uterine contractions
	Vaginal bleeding
	Endometritis
	Uterine status
	Uterine malformations
	Uterine fibroid
2.Past History	Number of abortions
	Number of delivery
	Previous uterine surgery
	>5cm fibroid surgery
	Cervical surgery
3.Pregnancy-related diseases	Anemia
	Aplastic anemia
	Diabetes
	Idiopathic Thrombocytopenic Purpura
	Leukemia
	Kidney disease
	Liver disease
4.Complications of pregnancy	Polyhydramnios
	Placenta previa
	Abruptio placentae
	Number of fetus
	Fetal position
	Macrosomia
	Fetal hydrocephalus
	Fetal tumor
	Pregnancy-induced hypertension
5.Factors related to delivery	First stage of labor
	Second stage of labor
	Third stage of labor
	Dystocia
	Method of delivery
	Use of tocolytics
	Use of anesthetics before delivery
	Operative delivery
	Cervical laceration
	Perineal laceration
	Uterine rupture
	Incarcerated placenta/residual placenta
	Placenta accreta
	Succenturiate placenta