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.
Mulder E, Ghossein-Doha C, Appelman E, van Kuijk S, Smits L, van der Zanden R, van Drongelen J, Spaanderman M.Mulder E, et al. Among authors: spaanderman m.BMC Pregnancy Childbirth. 2020 Dec 12;20(1):775. doi: 10.1186/s12884-020-03475-w.BMC Pregnancy Childbirth. 2020.PMID: 33308198Free PMC article.