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.
Zaitseva M, Vollenhoven BJ, Rogers PA.Zaitseva M, et al. Among authors: rogers pa.Hum Reprod. 2008 May;23(5):1076-86. doi: 10.1093/humrep/den083. Epub 2008 Mar 13.Hum Reprod. 2008.PMID: 18343808