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July 19, 1941


Author Affiliations

Department of Obstetrics and Gynecology of the Metropolitan Hospital, New York.

JAMA. 1941;117(3):217. doi:10.1001/jama.1941.02820290059023

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To the Editor:—  Seymour and Benmosche reported in The Journal (May 31, p. 2489) the use of the electron microscope in studying and photographing the spermatozoon. While I do not wish to detract from this contribution in photographing a spermatozoon at a magnification of 27,000 diameters, some comment is evoked by the conclusions which these authors have drawn.Seymour and Benmosche photographed one or two sperms from a single specimen and on this basis describe the shape of the heads of spermatozoa to be "pear shaped." Although it is accepted by spermatologists that pear-shaped (pyriform) sperm heads are present among the normal sperms to the extent of only 4 to 9 per cent, it seems that Seymour and Benmosche were unaware of this and instead have utilized a pearshaped head and set it up as a normal standard.These authors also claim to have found, among other things, a "crater-like

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