11% to 22% of ALL PREGNACIES!

http://www.who.int/maternal_child_adolescent/epidemiology/stillbirth/en/

Stillbirths

Definition

The definition recommended by WHO for international comparison is a baby born with no signs of life at or after 28 weeks' gestation.

Incidence

In 2009 there was over 2.6 million stillbirths globally, with more than 8 200 deaths a day. The majority of these deaths occur in developing countries. Ninety-eight percent occurred in low- and middle-income countries. At least half of all stillbirths occur in the intrapartum period, representing the greatest time of risk. Intrapartum deaths account for 45% of third-trimester stillbirths globally but only 14% of third-trimester deaths in developed countries.

http://en.wikipedia.org/wiki/Miscarriage#Epidemiology

Miscarriage

Epidemiology

Determining the precise prevalence of miscarriage is not possible, because miscarriages occur before pregnancies become established and before women are aware they are pregnant.^[67] In addition, women with bleeding in early pregnancy may attend for medical care more often than women not experiencing bleeding.^[67] Some studies have attempted to account for this by recruiting women who are planning pregnancies and testing for very early pregnancy, although these would also not be representative of the wider population.^[67] A systematic review found that the cumulative risk of miscarriage between 5 and 20 weeks of gestation varied from 11% to 22% in studies assessing miscarriage rates.^[67] Up to the 13th week of pregnancy, the risk of miscarriage each week was around 2%, dropping to 1% in week 14 and reducing slowly between 14 and 20 weeks.^[67]
The prevalence of miscarriage increases with the age of the mother^[67]^[68] and the father.^[69]^[70] In a Danish register-based study where the prevalence of miscarriage was 11%, the prevalence rose from 9% in women at 22 years of age to 84% by 48 years of age.^[68]

^{http://www.marchofdimes.com/loss/miscarriage.aspx}

Miscarriage

A miscarriage is a pregnancy loss that occurs before 20 weeks, well before the fetus is able to survive outside the womb. About 10 to 15 percent of recognized pregnancies end this way (1, 2). As many as 40 percent of all pregnancies may end in miscarriage, because many losses occur before a woman realizes she is pregnant (3).

^{http://www.focusonthefamily.com/lifechallenges/relationship_challenges/miscarriage.aspx}