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. 2020 Nov;223(5):624–664. doi: 10.1016/j.ajog.2020.06.004

Figure 1.

Figure 1

PubMed publications, 1941–2018

A, Search term “Menstruation.” B, Search term “Menstrual Blood.”.

Critchley. Menstruation: science and society. Am J Obstet Gynecol 2020.