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1 gen 1904 anni - 1904- Van de Velde- the first to point out the relationship between the wave-like fluctuations of the BBT and ovulation (1904)
Aggiunto al nastro di tempo:
NFP History
By
N. Husk
12 nov 2017
0
0
695
Data:
1 gen 1904 anni
Adesso
~ 120 years ago
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