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.
Williams A, Tincello DG, White S, Adams EJ, Alfirevic Z, Richmond DH.Williams A, et al. Among authors: alfirevic z.BJOG. 2005 Aug;112(8):1066-9. doi: 10.1111/j.1471-0528.2005.00652.x.BJOG. 2005.PMID: 16045519
Williams A, Adams EJ, Tincello DG, Alfirevic Z, Walkinshaw SA, Richmond DH.Williams A, et al. Among authors: alfirevic z.BJOG. 2006 Feb;113(2):201-7. doi: 10.1111/j.1471-0528.2006.00806.x.BJOG. 2006.PMID: 16411999Clinical Trial.
O'Brien E, Rauf Z, Alfirevic Z, Lavender T.O'Brien E, et al. Among authors: alfirevic z.Midwifery. 2013 Apr;29(4):325-31. doi: 10.1016/j.midw.2012.01.014. Epub 2012 Nov 16.Midwifery. 2013.PMID: 23159160