I Definition Abortion is termination of pregnancy before 28 weeks of gestation and nd the fetal weight is less tan 1000 a Abortion: spontaneous: 10%0-18% artificial I The early abortion: occurs before 12w The late abortion: occurs after 12wⅠ. Definition ◼ Abortion is termination of pregnancy before 28 weeks of gestation and the fetal weight is less tan 1000g. ◼ Abortion : spontaneous: 10%~18% artificial ◼ The early abortion: occurs before 12w ◼ The late abortion: occurs after 12w