Editing Calendar-based contraceptive methods (section)

==Advantages==
The Standard Days method (SDM) was introduced as part of [[family planning]] programs in developing countries.<ref>{{cite journal |last1=Weis |first1=Julianne |last2=Festin |first2=Mario |title=Implementation and Scale-Up of the Standard Days Method of Family Planning: A Landscape Analysis |journal=Global Health, Science and Practice |pages=114–124 |doi=10.9745/GHSP-D-19-00287 |date=30 March 2020|volume=8 |issue=1 |pmid=32033980 |pmc=7108942 }}</ref> The method is satisfactory for many women and men.<ref>{{cite journal |vauthors=Kalaca S, Cebeci D, Cali S, Sinai I, Karavus M, Jennings V |title=Expanding family planning options: offering the Standard Days Method to women in Istanbul |journal=J Fam Plann Reprod Health Care |volume=31 |issue=2 |pages=123–7 |year=2005 |pmid=15921552 |doi=10.1783/1471189053629446|doi-access=free |hdl=11424/241581 |hdl-access=free }}</ref><ref>{{citation |author1=Urmil Dosajh |author2=Ishita Ghosh |author3=Rebecka Lundgren |title=Feasibility of Incorporating the Standard Days Method into CASP Family Planning Services in Urban Slums of India |publisher=The Institute for Reproductive Health, Georgetown University |url=http://pdf.usaid.gov/pdf_docs/PNADG768.pdf |archive-url=https://web.archive.org/web/20061001111304/http://pdf.usaid.gov/pdf_docs/PNADG768.pdf |url-status=dead |archive-date=October 1, 2006 |access-date=2006-12-02 }}</ref> The low cost of the method may also enable it to play a useful role in countries that lack funding to provide other methods of [[birth control]].<ref>{{cite journal |vauthors=Gribble J, Jennings V, Nikula M |title=Mind the gap: responding to the global funding crisis in family planning. |journal =J Fam Plann Reprod Health Care |volume=30 |issue=3 |pages=155–7 |year=2004 |pmid=15222918 |doi=10.1783/1471189041261483|doi-access=free }}</ref>