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3 h 5 m, 1 oct 1964 año - 1964- Billings- first described ovulation method-CM method can be used to avoid or achieve
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NFP History
By
N. Husk
12 nov 2017
0
0
695
fecha:
3 h 5 m, 1 oct 1964 año
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~ 59 years ago
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