Gynaecology & Obstetrics General obstetrics af3179b4

WHO definition of aboion is

Pregnancy termination or loss before 12 weeks of gestation

Pregnancy termination or loss before 20 weeks of gestation

Pregnancy termination or loss before 22 weeks of gestation

Pregnancy termination or loss before 24 weeks of gestation

High-Yield Explanation

The National Center for Health Statistics, the Centers for Disease Control and Prevention, and the World Health Organization all define aboion as pregnancy termination or loss before 20 weeks' gestation or with a fetus delivered weighing <500 g.Reference: William's Obstetrics; 25th edition; Chapter 18; Aboion

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