Have you heard of Standard Days Method?
A woman uses a string of colored beads to know the days she can get pregnant. On the days she can get pregnant, she uses a condom or does not have sexual intercourse.
Kodi munamvapo za njira yakulera ya chingwe cha mikanda ya mitundu yosiyanasiyana?

Amayi amagwiritsa ntchito chingwe cha mikanda ya mitundu yosiyanasiyana kuti azidziwa masiku womwe angathe kutenga pathupi. Ndipo m'masiku omwe angathe kutenga pathupi, iwo amagwiritsa ntchito condom kapenanso sagonana ndi mwamuna.