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7 h 11 m, 1 jun 1962 año - 1962- Keefe- first published work on the changes in cervix (cervial os) around ovulation
Añadido al timeline:
NFP History
By
N. Husk
12 nov 2017
0
0
695
fecha:
7 h 11 m, 1 jun 1962 año
Ahora mismo
~ 62 years ago
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