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William A. Evans Jr., M. C.
JAMA. 1944;125(1):82. doi:10.1001/jama.1944.02850190084023.
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To the Editor:—  In connection with the proposal made by Dr. Pendleton Tompkins (The Journal, March 11, p. 698) that basal temperature graphs be used to determine the date of ovulation, I should like to make the following suggestions in order to render the application of the method easier. In doing so, I am in no way passing judgment on the reliability of the method itself.

  1. Oral temperatures are just as satisfactory for this purpose as rectal ones and are certainly easier to obtain.

  2. Evening temperatures, taken just prior to going to bed, show the same cyclic variations as do morning ones. Precautions to be observed: rest in a chair for about an hour, no cold drinks for one hour nor hot drinks for half an hour before temperatures are taken. From the standpoint of timing inseminations so that they follow a rise in body temperature, evening temperatures


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