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.
Arroyo JA, Garcia-Jones P, Graham A, Teng CC, Battaglia FC, Galan HL.Arroyo JA, et al.Biol Reprod. 2012 Mar 30;86(3):94. doi: 10.1095/biolreprod.111.094797. Print 2012 Mar.Biol Reprod. 2012.PMID: 22190709Free PMC article.