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Article
June 22, 1957

PREGNANCY AND THE MENSTRUAL CYCLE

JAMA. 1957;164(8):917. doi:10.1001/jama.1957.02980080087025

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Abstract

To the Editor:—  In Foreign Letters, The Journal, March 30, page 1174, there is a report on an article by Gold of Montreal. His original article, "The Relationship Between Length of Menstrual Cycle and Date of Delivery was published in the Canadian Medical Association Journal of Jan. 1, 1957, page 29.In The Journal report it says: "His statistical analysis showed a consistent trend in the relationship between the length of the menstrual cycle and the duration of gestation." Nowhere in his discussion and summary does he mention "duration of gestation. He only discusses "length of menstrual cycle and the time of delivery."Using his data, I confirm my own conclusions based upon my own data: the duration of pregnancy varies inversely with the length of the menstrual cycle. His data and mine, with ovulation dates from the graph by Riley, Dontas, and Gill in Fertility and Sterility of March-April,

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