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.
Liu S, Heaman M, Kramer MS, Demissie K, Wen SW, Marcoux S; Maternal Health Study Group of the Canadian Perinatal Surveillance System.Liu S, et al. Among authors: wen sw.Am J Obstet Gynecol. 2002 Sep;187(3):681-7. doi: 10.1067/mob.2002.125765.Am J Obstet Gynecol. 2002.PMID: 12237648
Joseph K, Liu S, Demissie K, Wen SW, Platt RW, Ananth CV, Dzakpasu S, Sauve R, Allen AC, Kramer MS; The Fetal and Infant Health Study Group of the Canadian Perinatal Surveillance System.Joseph K, et al. Among authors: wen sw.BMC Pregnancy Childbirth. 2003 Jun 2;3(1):3. doi: 10.1186/1471-2393-3-3.BMC Pregnancy Childbirth. 2003.PMID: 12780942Free PMC article.