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.
Chai J, Tang OS, Hong QQ, Chen QF, Cheng LN, Ng E, Ho PC.Chai J, et al. Among authors: ho pc.Hum Reprod. 2009 Feb;24(2):320-4. doi: 10.1093/humrep/den425. Epub 2008 Dec 1.Hum Reprod. 2009.PMID: 19049993Clinical Trial.
Tang OS, Ho PC.Tang OS, et al. Among authors: ho pc.Contraception. 2001 Nov;64(5):315-7. doi: 10.1016/s0010-7824(01)00261-x.Contraception. 2001.PMID: 11777493
Lee VC, Ng EH, Ho PC.Lee VC, et al. Among authors: ho pc.Best Pract Res Clin Obstet Gynaecol. 2010 Aug;24(4):517-27. doi: 10.1016/j.bpobgyn.2010.02.008. Epub 2010 Mar 29.Best Pract Res Clin Obstet Gynaecol. 2010.PMID: 20347397Free article.
Ho PC, Ngai SW, Liu KL, Wong GC, Lee SW.Ho PC, et al.Obstet Gynecol. 1997 Nov;90(5):735-8. doi: 10.1016/S0029-7844(97)00419-5.Obstet Gynecol. 1997.PMID: 9351755Clinical Trial.