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.
Cnossen JS, van der Post JA, Mol BW, Khan KS, Meads CA, ter Riet G.Cnossen JS, et al. Among authors: khan ks.BMC Pregnancy Childbirth. 2006 Oct 19;6:29. doi: 10.1186/1471-2393-6-29.BMC Pregnancy Childbirth. 2006.PMID: 17052339Free PMC article.