Περίοδος και αντισυλληπτικά

Question

&Kappa;&alpha;&lambda;&eta;&sigma;&pi;έ&rho;&alpha; &sigma;&alpha;&sigmaf;. &Pi;&rho;&iota;&nu; 20 &mu;έ&rho;&epsilon;&sigmaf; &xi;&epsilon;&kappa;ί&nu;&eta;&sigma;&alpha; &alpha;&nu;&tau;&iota;&sigma;&upsilon;&lambda;&lambda;&eta;&pi;&tau;&iota;&kappa;&alpha; &sigma;&tau;&eta;&nu; 1&eta; &mu;έ&rho;&alpha; &pi;&epsilon;&rho;&iota;ό&delta;&omicron;&upsilon; &mu;&omicron;&upsilon;. &Sigma;&upsilon;&gamma;&kappa;&epsilon;&kappa;&rho;&iota;&mu;έ&nu;&alpha; &tau;&alpha; estrofix &gamma;&iota;&alpha; &tau;&eta;&nu; &kappa;&alpha;&tau;&alpha;&pi;&omicron;&lambda;έ&mu;&eta;&sigma;&eta; &tau;&omega;&nu; έ&nu;&tau;&omicron;&nu;&omega;&nu; &pi;ό&nu;&omega;&nu; &pi;&epsilon;&rho;&iota;ό&delta;&omicron;&upsilon;. &Tau;&eta;&nu; &tau;&epsilon;&lambda;&epsilon;&upsilon;&tau;&alpha;ί&alpha; &epsilon;&beta;&delta;&omicron;&mu;ά&delta;&alpha; &lambda;ή&psi;&eta;&sigmaf; &tau;&eta;&sigmaf; &alpha;&gamma;&omega;&gamma;ή&sigmaf; &xi;έ&chi;&alpha;&sigma;&alpha; &nu;&alpha; &pi;ά&rho;&omega; &tau;&omicron; &chi;ά&pi;&iota; &tau;&eta;&sigmaf; &eta;&mu;έ&rho;&alpha;&sigmaf; &Pi;έ&mu;&pi;&tau;&eta;&sigmaf; &kappa;&alpha;&theta;ώ&sigmaf; &delta;&epsilon;&nu; &tau;&omicron; &epsilon;ί&chi;&alpha; &mu;&alpha;&zeta;ί &mu;&omicron;&upsilon;,&mu;&epsilon; &alpha;&pi;&omicron;&tau;έ&lambda;&epsilon;&sigma;&mu;&alpha; &nu;&alpha; &tau;&omicron; &pi;&alpha;&rho;&alpha;&lambda;&epsilon;ί&psi;&omega; &kappa;&alpha;&iota; &nu;&alpha; &pi;ά&rho;&omega; &pi;ά&lambda;&iota; &tau;&eta;&nu; &epsilon;&pi;ό&mu;&epsilon;&nu;&eta; &mu;έ&rho;&alpha; &gamma;&iota;&alpha; &tau;&eta;&nu; &eta;&mu;έ&rho;&alpha; &Pi;&alpha;&rho;&alpha;&sigma;&kappa;&epsilon;&upsilon;ή. Έ&kappa;&tau;&omicron;&tau;&epsilon; &xi;&epsilon;&kappa;ί&nu;&eta;&sigma;&epsilon; &eta; έ&kappa;&kappa;&rho;&iota;&sigma;&eta; &kappa;&alpha;&phi;έ &upsilon;&gamma;&rho;ώ&nu; &kappa;&alpha;&iota; &sigma;&iota;&gamma;ά &sigma;&iota;&gamma;ά &mu;&iota;&kappa;&rho;ή&sigmaf; &pi;&omicron;&sigma;ό&tau;&eta;&tau;&alpha;&sigmaf; &alpha;ί&mu;&alpha;&tau;&omicron;&sigmaf; &sigma;&epsilon; &kappa;&alpha;&theta;&eta;&mu;&epsilon;&rho;&iota;&nu;ή &beta;ά&sigma;&eta; &kappa;&alpha;&theta;ώ&sigmaf; &kappa;&alpha;&iota; &mu;&iota;&kappa;&rho;ό&sigmaf; &pi;ό&nu;&omicron;&sigmaf; &sigma;&tau;&eta;&nu; &pi;&epsilon;&rho;&iota;&omicron;&chi;ή &tau;&eta;&sigmaf; &kappa;&omicron;&iota;&lambda;&iota;ά&sigmaf; (&pi;&alpha;&rho;ό&mu;&omicron;&iota;&omicron;&sigmaf; &mu;&epsilon; &alpha;&upsilon;&tau;ό&nu; &tau;&eta;&nu; &pi;&epsilon;&rho;&iota;ό&delta;&omicron;&upsilon;). &Epsilon;&pi;ί&sigma;&eta;&sigmaf; &tau;&omicron; &xi;έ&rho;&omega; &pi;&omega;&sigmaf; ί&sigma;&omega;&sigmaf; &nu;&alpha; &omicron;&phi;&epsilon;ί&lambda;&epsilon;&tau;&alpha;&iota; &sigma;&tau;&eta;&nu; &alpha;&rho;&chi;ή &alpha;&lambda;&lambda;ά &pi;&alpha;&rho;&omicron;&upsilon;&sigma;&iota;ά&zeta;&omega; &kappa;&alpha;&iota; &mu;&iota;&kappa;&rho;&alpha; &sigma;&pi;&upsilon;&rho;ά&kappa;&iota;&alpha;. &Mu;&epsilon; &alpha;&nu;&eta;&sigma;&upsilon;&chi;&epsilon;ί &eta; &epsilon;&mu;&phi;ά&nu;&iota;&sigma;&eta; &alpha;&upsilon;&tau;ή&sigmaf; &tau;&eta;&sigmaf; &pi;&epsilon;&rho;&iota;ό&delta;&omicron;&upsilon; &epsilon;&nu;ώ &epsilon;ί&mu;&alpha;&iota; &sigma;&tau;&alpha; &mu;έ&sigma;&alpha; &pi;&epsilon;&rho;ί&pi;&omicron;&upsilon; &tau;&omicron;&upsilon; &kappa;ύ&kappa;&lambda;&omicron;&upsilon;. &Kappa;&alpha;&iota; &delta;&epsilon;&nu; &beta;&lambda;έ&pi;&omega; &nu;&alpha; &upsilon;&pi;&omicron;&chi;&omega;&rho;&epsilon;ί. &Theta;&alpha; ή&theta;&epsilon;&lambda;&alpha; &tau;&eta;&nu; ά&pi;&omicron;&psi;&eta; &kappa;&alpha;&iota; &beta;&omicron;ή&theta;&epsilon;&iota;&alpha; &sigma;&alpha;&sigmaf;. &Epsilon;&upsilon;&chi;&alpha;&rho;&iota;&sigma;&tau;ώ &epsilon;&kappa; &tau;&omega;&nu; &pi;&rho;&omicron;&tau;έ&rho;&omega;&nu;.