Table 1.

Classification of pregnancy loss.

Spontaneous abortion or miscarriage	Early pregnancy loss, miscarriage, or spontaneous abortion	Before 10 weeks of pregnancy (2)
	Late abortion, late miscarriage, or fetal miscarriage	Between 10 and 22 weeks of pregnancy (2)
	Recurrent miscarriage	Two or more (3) or three or more (4) miscarriages not required to be consecutive; or two or more consecutive miscarriages (5)
	Fetal loss or stillbirth	After >22 weeks (6)
Voluntary termination of pregnancy	Abortion or induced abortion	Voluntarily termination of pregnancy, including termination due to fetal malformations (7)
	Fetal reduction	Specific type of induced abortion involving a multiple gestation, where one or more of the fetuses are chosen to be voluntarily terminated (8)