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Midwifery / Fertility awareness / Demography / Birth control / Fertility / Natural family planning / Billings ovulation method / Unintended pregnancy / Creighton Model FertilityCare System / Natural fertility / Sexual intercourse / Family planning


Human Reproduction Vol.22, No.5 pp. 1310–1319, 2007 doi:humrep/dem003 Advance Access publication February 20, 2007
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Document Date: 2014-05-29 15:47:39


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