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14. My journey to natural family planning. Staicer C. Midwifery Today Int Midwife; 1999 Mar; (51):34-5, 65. PubMed ID: 10808872 [No Abstract] [Full Text] [Related]
16. [The cervical mucus crystallization test and other selected parameters of ovulation]. Wagrowska-Danilewicz M, Danilewicz M. Ginekol Pol; 1986 Jun; 57(6):427-32. PubMed ID: 3744122 [No Abstract] [Full Text] [Related]
17. Infertility. Pitt C. Aust Fam Physician; 2005 Sep; 34(9):712. PubMed ID: 16265813 [No Abstract] [Full Text] [Related]