Na količino žleznega, vezivnega tkiva in maščobe ter na razmerje med njimi, vpliva več dejavnikov, na primer: starost ženske, menstrualni ciklus, nosečnost, hormonska substitucija.
Several factors, e.g. age, menstrual cycle, pregnancy, hormonal replacement etc., may influence upon the quantity of the glandular, connective and adipose tissues and the proportional relations among them.