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.
Castillo E, Magee LA, von Dadelszen P, Money D, Blondel-Hill E, van Schalkwyk J.Castillo E, et al.J Obstet Gynaecol Can. 2008 Sep;30(9):796-799. doi: 10.1016/S1701-2163(16)32944-9.J Obstet Gynaecol Can. 2008.PMID: 18845049