Table 2.

Types of perinatal loss

Term	Definition	Epidemiology
Miscarriage/spontaneous abortion	Unintended termination of pregnancy before   20 weeks of gestation.	15–20 % of recognized pregnancies [50].   Risk increases with maternal age [51].
Recurrent pregnancy loss (RPL)	2–3 consecutive pregnancy losses (not required   to be intrauterine) [52]. Primary RPL—pregnancy loss in women who   have never had a viable pregnancy. Secondary RPL—pregnancy loss in women who   have had a previous live birth.	2 to 3 % [53].
Stillbirth	Death of the fetus after 20 weeks gestation/after   reaching 14 oz. weight [54]. Fetal death in utero   or in the process of delivery.	4.6 per 1000 live births in singleton pregnancies.
Neonatal death: early neonatal death (<7 days),   or late neonatal death (7 to 27 days).   Includes SIDS	Death of the baby after a live birth and before   28 days after gestation [55].	6.2 per 1000 live births [56]. Neonatal deaths   account for nearly two thirds of all infant   deaths annually [57].