Abstract
For purposes of the present discussion, an abortion will be defined as a conceptus expelled, removed or delivered before the 20th week of gestation. Local statutes and regulations, particularly state regulations, vary in the definition of what constitutes an abortion and thus viability, but 20 weeks is most commonly used. Furthermore, the definitions of abortion and the age of viability are vastly different from country to country, even reaching the level of 28 weeks in some countries, rendering the statistics on abortions, pregnancy loss, and neonatal and infant morbidity and mortality completely useless in comparing populations worldwide.
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Baergen, R.N. (2011). Abortion and the Placenta in Chromosomal Anomalies. In: Manual of Pathology of the Human Placenta. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-7494-5_11
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DOI: https://doi.org/10.1007/978-1-4419-7494-5_11
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