View an extended trailer of a soon-to-be released documentary on the discovery of the Billings Ovulation Method®
https://www.youtube.com/watch?v=zj0L3IIS8mA&feature=youtu.be
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View an extended trailer of a soon-to-be released documentary on the discovery of the Billings Ovulation Method®
https://www.youtube.com/watch?v=zj0L3IIS8mA&feature=youtu.be