There are many risk factors for placenta praevia in Asian women, of which include pregnancies occurring in women ages 35 and older (advanced maternal age) or in women who have had a prior Caesarean section, having multiple pregnancies, and experiencing either miscarriage or abortion in the past. In comparison with other Asian countries, placenta praevia is more common in Japan (13.9 per 1000) and Korea (15 per 1000). In the Middle East, placenta praevia rates are lower in both Saudi Arabia (7.3 per 1000) and Israel (4.2 per 1000). Australia
The continent with the second highest rates for placenta praevia is Australia, where it affects about 9.5 out of every 1000 pregnant women. Researchers concerned with these rates have tested the specificity and sensitivity of fetal anomaly scans. In conclusion, it was determined the threshold that defines placenta praevia (based on proximity of placenta to cervix) must be reduced in order to improve the accuracy of diagnoses and to avoid false positives leading screenings. Europe
Placenta praevia in Europe occurs in about 3.6 per 1000 pregnancies. Latin America
In Latin America, placenta praevia occurs in about 5.1 per 1000 pregnancies. North America
In North America placenta praevia occurs in 2.9 per 1000 pregnancies. Ethnic differences indicate White women are less likely to experience placenta praevia than Black women. Additionally, more cases of placenta praevia are found in women from low-income areas which are linked to insufficient pregnancy care.
Sarna may refer to:

Sarna (Polish surname)
Sarna (Punjabi surname)
Sarna (clan), a Punjabi clan of India
Sarna, Warmian-Masurian Voivodeship, a village in northern Poland
Särna, a locality in Dalarna County, Sweden
SaRNA, small activating RNA
Sarna sthal – place of worship
Sarna (drug), a drug
Sarna (religion)

See also
All pages with titles containing Sarna
Sarnaism, the religious beliefs held by tribes in the state of Jharkhand, India, and other central Indian states
Srna (disambiguation)Sarna.net ("Sarna" for short) is the fan wiki project for the fictional BattleTech universe, named after the equally fictional star system therein.