Abstract
IN a report in NATURE of March 18 of an address delivered by Dr. L. S. Penrose to the Industrial Section of the British Psychological Society on February 8, the following sentence occurs: “When the birth-rate is falling, the average maternal age [average age at child-birth] will probably become greater”. In support of this view it is stated that Dr. Penrose estimates the average maternal age in England at the present time at 29 years, whilst, in Japan (with a much higher birth-rate), it is said to be 26 years.
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References
Cf. Barclay and Kermack, Proc. Roy. Soc. Edin., 58, 55–72 (1938).
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BARCLAY, R., KERMACK, W. Changes of Average Maternal Age. Nature 143, 804–805 (1939). https://doi.org/10.1038/143804b0
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DOI: https://doi.org/10.1038/143804b0
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