Reduced ratio of male to female births in several industrial countries: a sentinel health indicator?
DL Davis, MB Gottlieb, JR Stampnitzky - Jama, 1998 - jamanetwork.com
Context.—The sex ratio of 1.06: 1, the ratio of male to female births, has declined over the
past decades. Recent reports from a number of industrialized countries indicate that the
proportion of males born has significantly decreased, while some male reproductive tract
disorders have increased. Objectives.—To examine the evidence for declines in the male
proportion at birth and suspected causes for this decline, and to determine whether altered
sex ratio can be considered a sentinel health event. Data Sources.—Birth records were …
past decades. Recent reports from a number of industrialized countries indicate that the
proportion of males born has significantly decreased, while some male reproductive tract
disorders have increased. Objectives.—To examine the evidence for declines in the male
proportion at birth and suspected causes for this decline, and to determine whether altered
sex ratio can be considered a sentinel health event. Data Sources.—Birth records were …