The symptothermal (double check) method: an efficient natural method of family planning.
Soler
Françoise
F
Barranco-Castillo
Enriqueta
E
D015982:Bias; D005260:Female; D006801:Humans; D016247:Information Storage and Retrieval / Q000379:methods; D012252:Natural Family Planning Methods; D049168:Pregnancy, Unplanned