אמצעי מניעה מבוססי לוח שנה
הערות שוליים

↑  Rhythm Method, web.archive.org, ‏2008-05-12
↑  Will I Get Pregnant if I Use the Rhythm Method of Birth Control?, WebMD (באנגלית)
↑  Philip Schaff: NPNF1-04. Augustine: The Writings Against the Manichaeans and Against the Donatists - Christian Classics Ethereal Library, www.ccel.org
↑  Karen Abbott, Sin in the Second City: Madams, Ministers, Playboys, and the Battle for America's Soul, Random House Publishing Group, 2007-07-10. (באנגלית)
↑  Bernard Ineichen, A History of Contraception: From Antiquity to the Present Day. By Angus McLaren. Pp. 272. (Basil Blackwell, 1990.) £25.00. - Women's Power and Social Revolution: Fertility Transition in the West Indies. By W. Penn Handwerker. Pp. 253. (Sage, London, 1989.) £29.25, hardback, £13.95, paperback., Journal of Biosocial Science 23, 1991-10, עמ' 510–511 doi: 10.1017/S0021932000019635
↑  Marilyn Yalom, The American Resting Place: 400 Years of History Through Our Cemeteries and Burial Grounds, Houghton Mifflin Harcourt, 2008-05-15. (באנגלית)
↑  Toni Weschler, Taking charge of your fertility : the definitive guide to natural birth control, pregnancy achievement, and reproductive health, New York : HarperCollins, 2002<gwmw class="ginger-module-highlighter-mistake-type-3" id="gwmw-15786438775792243928823"> :</gwmw> HarperCollins, 2002
1 2  Robert Anthony Hatcher, Contraceptive Technology, Ardent Media, 2007. (באנגלית)
↑  Marcos Arévalo, Victoria Jennings, Irit Sinai, Efficacy of a new method of family planning: the Standard Days Method, Contraception 65, 2002-05, עמ' 333–338 doi: 10.1016/S0010-7824(02)00288-3
↑  Cicely A. Marston, Kathryn Church, Does the evidence support global promotion of the calendar-based Standard Days Method® of contraception?, Contraception 93, 2016-06, עמ' 492–497 doi: 10.1016/j.contraception.2016.01.006
↑  Can an App Prevent Pregnancy?, Time (באנגלית)
1 2  Richard J. Fehring, New Low- and High-Tech Calendar Methods of Family Planning, Journal of Midwifery & Women's Health 50, 2005-01-02, עמ' 31–38 doi: 10.1016/j.jmwh.2004.07.001
↑  Sibel Kalaca, Dilsad Cebeci, Sanda Cali, Irit Sinai, Expanding family planning options: offering the Standard Days Method™ to women in Istanbul, Journal of Family Planning and Reproductive Health Care 31, 2005-04-01, עמ' 123–127 doi: 10.1783/1471189053629446
↑  James N Gribble, Victoria Jennings, Minna Nikula, Mind the gap: responding to the global funding crisis in family planning, Journal of Family Planning and Reproductive Health Care 30, 2004-07-01, עמ' 155–157 doi: 10.1783/1471189041261483
↑  R.H. Gray, Aged gametes, adverse pregnancy outcomes and natural family planning, Contraception 30, 1984-10, עמ' 297–309 doi: 10.1016/S0010-7824(84)80022-0
↑  Ronald H. Gray, Joe L. Simpson, Robert T. Kambic, John T. Queenan, Timing of conception and the risk of spontaneous abortion among pregnancies occurring during the use of natural family planning, American Journal of Obstetrics and Gynecology 172, 1995-05, עמ' 1567–1572 doi: 10.1016/0002-9378(95)90498-0
↑  M. Barbato, A. Bitto, R.H. Gray, J.L. Simpson, [No title found], Advances in Contraception 13, 1997, עמ' 215–228 doi: 10.1023/A:1006508106197
↑  L Bovens, The rhythm method and embryonic death, Journal of Medical Ethics 32, 2006-06-01, עמ' 355–356 doi: 10.1136/jme.2005.013920
הבהרה: המידע בוויקיפדיה נועד להעשרה בלבד ואינו מהווה ייעוץ רפואי.