[Family planning only by examining cervix mucus is unreliable].
Strobel
E
E
D002582:Cervix Mucus; D003906:Developing Countries; D005193:Family Planning Services / Q000379:methods*; D005260:Female; D006801:Humans; D011237:Predictive Value of Tests; D011247:Pregnancy
Familienplanung allein durch Zervixschleimbeobachtung zu unsicher.