[Natural family planning. An alternative].
Soler
F
F
Fernández Martínez
M
M
Díaz Sáez
J
J
D005193:Family Planning Services / Q000379:methods*; D005260:Female; D006801:Humans; D008597:Menstrual Cycle / Q000502:physiology; D012252:Natural Family Planning Methods
Planificación familiar natural. una alternativa.