An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Barnett JV, Desgrosellier JS.Barnett JV, et al.Birth Defects Res C Embryo Today. 2003 Feb;69(1):58-72. doi: 10.1002/bdrc.10006.Birth Defects Res C Embryo Today. 2003.PMID: 12768658Review.