Frequency of chromosomal abnormalities in miscarriages and perinatal deaths.

Abstract
There is a very high mortality among human conceptuses before, during and shortly after birth, which is known as reproductive loss or pregnancy wastage. Chromosomal abnormalities are among the most important causes, particularly in the developed countries. The prevalence of chromosome abnormalities in spontaneously aborted fetuses, in infants dying during the perinatal period and in liveborn infants are given.