Abortion is the expulsion or extraction from its mother of an embryo or fetus weighting 500 gm, or less when it is not capable or independent survival. (WHO), this 500 gm, of fetal development is attained approximately at 22 weeks (154 days) or gestation. The expelled embryo or fetus is called abortus. The term miscarriage is the recommended terminology for spontaneous abortion. … Continue readingAbortion, Definition of Abortion, Classification of Abortion, Types of Abortion, (by GS India Nursing).