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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1949 1
1953 2
1954 1
2023 0

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Page 1
A study of variation in the length of the menstrual cycle.
McKEOWN T, GIBSON JR, DOUGRAY T. McKEOWN T, et al. Among authors: dougray t. J Obstet Gynaecol Br Emp. 1954 Oct;61(5):678-82. doi: 10.1111/j.1471-0528.1954.tb07708.x. J Obstet Gynaecol Br Emp. 1954. PMID: 13212504 No abstract available.
Period between ovulation and birth.
GIBSON JR, DOUGRAY T. GIBSON JR, et al. Among authors: dougray t. Br J Prev Soc Med. 1953 Jul;7(3):160-2. doi: 10.1136/jech.7.3.160. Br J Prev Soc Med. 1953. PMID: 13081977 Free PMC article. No abstract available.