ليس الآن

[1] Reproduction, (HRP) Department of Reproductive Health and Research World Health Organization. Retrieved from https://www.gfmer.ch/Endo/Lectures_11/Naturalc.htm

[2] SOGC The Society of Obstetricians and Gynaecologists of Canada. (2016). Contraception. Retrieved from https://www.sexandu.ca/wp-content/uploads/2016/09/Contraception_Methods_Booklet.pdf

[3] Society of Obstetricians and Gynaecologists of Canada. (2015). Canadian Contraception Consensus Chapter 4: Natural Family Planning. JOGC Journal of Obstetrics and Gynaecology Canada. Retrieved from https://www.jogc.com/article/S1701-2163(16)39375-6/pdf

[4] Vogelsong, K. M. (2017). Natural Contraceptive Methods. UNDP/UNFPA/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction, (HRP) Department of Reproductive Health and Research World Health Organization. Retrieved from https://www.gfmer.ch/Endo/Lectures_11/Naturalc.htm

[5] World Health Organization Department of Reproductive Health and Research and Johns Hopkins Bloomberg School of Public Health Center for Communication Programs (2018) Family Planning: A Global Handbook for Providers. Baltimore and Geneva. Retrieved from https://apps.who.int/iris/bitstream/handle/10665/260156/9780999203705-eng.pdf?sequence=1

[6] World Health Organization. (2016). Selected practice recommendations for contraceptive use. Geneva. Retrieved from https://apps.who.int/iris/bitstream/handle/10665/252267/9789241565400-eng.pdf?sequence=1