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62. The ovulation method in developing countries with special reference to India. Mascarenhas MM. Indian J Prev Soc Med; 1982 Dec; 13(2-4):89-94. PubMed ID: 12279951 [Abstract] [Full Text] [Related]
63. Natural family planning. Lanctot CA. Clin Obstet Gynaecol; 1979 Apr; 6(1):109-27. PubMed ID: 383345 [Abstract] [Full Text] [Related]
64. Natural methods of family planning. Clubb E. J R Soc Health; 1986 Aug; 106(4):121-6. PubMed ID: 3091823 [Abstract] [Full Text] [Related]
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67. Sex ratio associated with timing of insemination and length of the follicular phase in planned and unplanned pregnancies during use of natural family planning. Gray RH, Simpson JL, Bitto AC, Queenan JT, Li C, Kambic RT, Perez A, Mena P, Barbato M, Stevenson W, Jennings V. Hum Reprod; 1998 May; 13(5):1397-400. PubMed ID: 9647580 [Abstract] [Full Text] [Related]
70. Comparative evaluation of two methods of natural family planning in Columbia. Medina JE, Cifuentes A, Abernathy JR, Spieler JM, Wade ME. Am J Obstet Gynecol; 1980 Dec 15; 138(8):1142-7. PubMed ID: 7446621 [Abstract] [Full Text] [Related]
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78. Ovulation method of natural family planning. Connell-Tatum EB. Fertil Steril; 1981 Nov 15; 36(5):551-2. PubMed ID: 7308500 [Abstract] [Full Text] [Related]
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