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.
Wooding FB, Chambers SG, Perry JS, George M, Heap RB.Wooding FB, et al. Among authors: perry js.Anat Embryol (Berl). 1980;158(3):361-70. doi: 10.1007/BF00301823.Anat Embryol (Berl). 1980.PMID: 7356185
Heap RB, Galil AK, Harrison FA, Jenkin G, Perry JS.Heap RB, et al. Among authors: perry js.Ciba Found Symp. 1977;(47):127-57. doi: 10.1002/9780470720295.ch7.Ciba Found Symp. 1977.PMID: 246390
Jones LT, Heap RB, Perry JS.Jones LT, et al. Among authors: perry js.J Reprod Fertil. 1976 May;47(1):129-31. doi: 10.1530/jrf.0.0470129.J Reprod Fertil. 1976.PMID: 1271364No abstract available.