Skip navigation

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Results 1 - 1 of 1 for Anomaly of sex chromosome
  1. Birth Defects (National Library of Medicine)  
    ... with Down syndrome, the child has an extra chromosome. Exposures to ... you get pregnant Centers for Disease Control and Prevention