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.
Bongso A, Ng SC, Fong CY, Ratnam S.Bongso A, et al. Among authors: fong cy.Fertil Steril. 1991 Aug;56(2):179-91. doi: 10.1016/s0015-0282(16)54468-9.Fertil Steril. 1991.PMID: 2070845Free article.Review.
Bongso A, Fong CY, Ng SC, Ratnam S.Bongso A, et al. Among authors: fong cy.Fertil Steril. 1994 May;61(5):976-8. doi: 10.1016/s0015-0282(16)56717-x.Fertil Steril. 1994.PMID: 8174741Free article.
Bongso A, Fong CY, Ng SC, Ratnam S.Bongso A, et al. Among authors: fong cy.Fertil Steril. 1992 Jan;57(1):129-33. doi: 10.1016/s0015-0282(16)54788-8.Fertil Steril. 1992.PMID: 1730306Free article.Clinical Trial.
Bongso A, Ng SC, Fong CY, Ratnam S.Bongso A, et al. Among authors: fong cy.J In Vitro Fert Embryo Transf. 1991 Aug;8(4):216-21. doi: 10.1007/BF01130808.J In Vitro Fert Embryo Transf. 1991.PMID: 1753168Clinical Trial.