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[1] [7] [60] [123] A 2012 review found the risk of miscarriage between 5 and 20 weeks from 11% to 22%. [157] 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.
A pregnant woman sleeping on her back after 28 weeks of pregnancy may be a risk factor for stillbirth. [22] [27] After a stillbirth there is a 2.5% risk of another stillbirth in the next pregnancy (an increase from 0.4%). [28] In the United States, highest rates of stillbirths happen in pregnant women who: [29] are of low socioeconomic status
The World Health Organization defines perinatal mortality as the "number of stillbirths and deaths in the first week of life per 1,000 total births, the perinatal period commences at 22 completed weeks (154 days) of gestation, [3] and ends seven completed days after birth", [4] but other definitions have been used.
Early stillbirth is between 20 and 27 weeks gestation, while late stillbirth is between 28 and 36 weeks gestation. A term stillbirth is when the fetus dies 37 weeks and above. [ 47 ] This phenomenon can go beyond grief and can lead to worries about strange maternal feelings or postpartum treatment regarding complications of childbirth. [ 48 ]
The third trimester is defined as starting, between the beginning of week 28 (27 weeks + 0 days of GA) [36] or beginning of week 29 (28 weeks + 0 days of GA). [4] It lasts until childbirth . Timeline of pregnancy, including (from top to bottom): Trimesters, embryo/fetus development, gestational age in weeks and months, viability and maturity stages
March of Dimes also found that pregnant people exposed to environmental risks like extreme heat and air pollution are more likely to have preterm births, low birth weight, or stillbirth, as well ...
Following a stillbirth, women are at higher risk of another one; however, most subsequent pregnancies do not have similar problems. [144] Worldwide in 2019 there were about 2 million stillbirths that occurred after 28 weeks of pregnancy, this equates to 1 in 72 total births or one every 16 seconds. [145]
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