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.
Johnson KA, Gee RE.Johnson KA, et al.Curr Opin Obstet Gynecol. 2012 Dec;24(6):465-9. doi: 10.1097/GCO.0b013e328359efa9.Curr Opin Obstet Gynecol. 2012.PMID: 23014140Review.
Gee RE, Conry JA, Johnson K.Gee RE, et al.Obstet Gynecol. 2013 May;121(5):923-926. doi: 10.1097/AOG.0b013e31828ea070.Obstet Gynecol. 2013.PMID: 23635726No abstract available.
Johnson KA, Gee RE.Johnson KA, et al.Semin Perinatol. 2015 Jun;39(4):310-5. doi: 10.1053/j.semperi.2015.05.011. Epub 2015 Jul 15.Semin Perinatol. 2015.PMID: 26188595
Johnson KA.Johnson KA.Matern Child Health J. 2006 Sep;10(5 Suppl):S85-91. doi: 10.1007/s10995-006-0125-8.Matern Child Health J. 2006.PMID: 16802188Free PMC article.Review.