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.
Ogueh O, Wright EM, Jones J, Alaghband-Zadeh J, Nicolaides KH, Johnson MR.Ogueh O, et al. Among authors: wright em.BJOG. 2001 Sep;108(9):986-92. doi: 10.1111/j.1471-0528.2001.00219.x.BJOG. 2001.PMID: 11563471