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.
Shennan A, De Swiet M, Halligan A.Shennan A, et al.BMJ. 1994 Jun 18;308(6944):1634. doi: 10.1136/bmj.308.6944.1634a.BMJ. 1994.PMID: 8068123Free PMC article.No abstract available.
Shennan A, Halligan A, de Swiet M.Shennan A, et al.Br J Obstet Gynaecol. 1994 Apr;101(4):362-3. doi: 10.1111/j.1471-0528.1994.tb13638.x.Br J Obstet Gynaecol. 1994.PMID: 8199093No abstract available.
Shennan A, Gupta M, Halligan A, Taylor DJ, de Swiet M.Shennan A, et al.Lancet. 1996 Jan 20;347(8995):139-42. doi: 10.1016/s0140-6736(96)90338-4.Lancet. 1996.PMID: 8544546Clinical Trial.
Halligan A, Shennan A, Lambert PC, de Swiet M, Taylor DJ.Halligan A, et al.Obstet Gynecol. 1996 Feb;87(2):205-8. doi: 10.1016/0029-7844(95)00379-7.Obstet Gynecol. 1996.PMID: 8559524