Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Kupfuura: Seminal plasma inopa zvokudya uye inodzivirira ma"spermatozoa" pavanenge vari parwendo rwavo vachipfuura nomumugwagwa unobereka wechikadzi. Mugariro wenguva dzose wechibereko unopesana (ona kurwisana kwepabonde) nokuda kwemasero embeu, sezvo ine acid (kubva kune microflora yomunzvimbomo inobereka lactic acid), viscous, uye inotarisirwa nemasero ezvirwere. Zvikamu zviri muplasma yembeu zvinoedza kuenzanisa iyi nharaunda ine utsinye. Maamine makuru akadai seputrescine, spermine, spermidine uye cadaverine ndiwo anokonzera kunhuwirira nokuravira kwembeu yomurume. Aya magasi ane alkaline anodzivisa uye anodzivirira nharaunda ine acid yomumugwagwa womukadzi, uye anodzivirira DNA iri mukati mevana kuti isasvibiswa neasidhi.  Mubvunzo: Chibereko chipi chinotakura majini chomurume chinodzivirirwa?
DNA