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J Obstet Gynecol Neonatal Nurs. 1990 May-Jun;19(3):233-7. doi: 10.1111/j.1552-6909.1990.tb01642.x.

Methods used to self-predict ovulation. A comparative study.

Fehring RJ

https://doi.org/10.1111/j.1552-6909.1990.tb01642.x

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