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.
Markham SM, Carpenter SE, Rock JA.Markham SM, et al. Among authors: rock ja.Obstet Gynecol Clin North Am. 1989 Mar;16(1):193-219.Obstet Gynecol Clin North Am. 1989.PMID: 2664618Review.
Markham SM, Rock JA.Markham SM, et al. Among authors: rock ja.Aviat Space Environ Med. 1991 Jul;62(7):691-3.Aviat Space Environ Med. 1991.PMID: 1898308
Rezai N, Ghodgaonkar RB, Zacur HA, Rock JA, Dubin NH.Rezai N, et al. Among authors: rock ja.Fertil Steril. 1987 Jul;48(1):29-32. doi: 10.1016/s0015-0282(16)59285-1.Fertil Steril. 1987.PMID: 3595914Free article.