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.
Barkehall-Thomas A, Tong S, Baker LS, Edwards A, Wallace EM.Barkehall-Thomas A, et al. Among authors: tong s.Aust N Z J Obstet Gynaecol. 2006 Apr;46(2):97-101. doi: 10.1111/j.1479-828X.2006.00535.x.Aust N Z J Obstet Gynaecol. 2006.PMID: 16638029