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13 h, jan 1, 1929 y - 1929 -Van de Velde - 1st associated biphasic temp. curve with increased progesterone, correlated BBT to ovulation and higher temp curve with increased progesterone

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ByN. Husk
12 Nov 2017
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Date:

13 h, jan 1, 1929 y
Now
~ 96 years ago
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