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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.
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. [ 157 ] The precise rate is not known because a large number of miscarriages occur before pregnancies become established and before the woman is aware she is pregnant. [ 157 ]
Miscarriage risks are those circumstances, conditions, and substances that increase the risk of miscarriage. Some risks are modifiable and can be changed. Other risks cannot be modified and can't be changed. Risks can be firmly tied to miscarriages and others are still under investigation.
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As many as 25 percent of pregnancies end in miscarriage. About 1 percent of women suffer from three or more in a row, which is the definition of a recurrent miscarriage.
[8] [9] However, the case of intrauterine hematoma observed before 9 weeks of gestational age has been associated with an increased risk of miscarriage. [10] In one study women who complied with instructions for bed rest for the duration of bleeding had a lower rate of miscarriage and a higher rate of term pregnancy than non-compliant women.
This is a shortened version of the eleventh chapter of the ICD-9: Complications of Pregnancy, Childbirth, and the Puerperium.It covers ICD codes 630 to 679.The full chapter can be found on pages 355 to 378 of Volume 1, which contains all (sub)categories of the ICD-9.
The obstetric history of a female who has had four pregnancies, one of which was a miscarriage before 20 weeks, would be noted in the GPA system as G 4 P 3 A 1 and in the GP system as G 4 P 3. The obstetric history of a female who has had one pregnancy of twins with successful outcomes would be noted as G 1 P 1+1 .