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.
Tilden EL, Lee VR, Allen AJ, Griffin EE, Caughey AB.Tilden EL, et al. Among authors: lee vr.Birth. 2015 Sep;42(3):219-26. doi: 10.1111/birt.12179. Epub 2015 Jun 22.Birth. 2015.PMID: 26095829