Maererano nehuwandu, muna 40% emhosva, kusavapo kwevana kunowanikwa nekuda kwekushaya vakadzi , imwe 40% - murume. Izvo 20% inosara ndeye chikonzero chekubatana nekushaya vana, apo zvinetso zviripo kune vose vari vaviri.
Chiratidzo chokutanga chekushaya mwana, vose varume nemadzimai, kusavapo kwepamuviri nemukomana unogara usina kudzivirirwa kwemakore maviri kana kupfuura. Kana kubata kusina kuitika mushure memwedzi mitatu yekuedza, haitauri nezvekushaya simba - zvichida, zvepabonde hazvina kufanana nenguva yakanaka mumwedzi. Asi kana izvi zvinopfuurira kwegore rinopfuura, kune chiitiko chekushanda kune mumwe nyanzvi.
Zvikonzero zvechiitiko ichi ndezvizhinji-zvirwere zvinopararira, kudziviswa kwemawere ane simba mumukadzi kana kuti vas deferens mumurume, hutachiona hwehutachiona, varicose veins of the testicle, kuderedza potency, kutomenzana kwemaitiro emuviri, endometriosis nezvimwe zvakawanda.
Chiratidzo chekutanga chekushaya vana muvakadzi ndechokushayikwa kwegore negore uye ovulation. Chikonzero chekushayikwa kwemwedzi panguva yekubereka kunogona kutora mapiritsi ekuberekwa ekuberekwa, kusakanganiswa kweavoan, matambudziko ane hutachiona hwehutachiona, husina kunyatsogadzira nhengo dzekubereka, kusagadzikana kwemahomoni uye kunyanya kuonda, kana zvichida nekushaiwa kwemafuta mashoma, kumwedzi kunorega kuchengetedza simba.
Izvo hazvina humwe zviratidzo zvekusabereka mumarume. Inogona kuonekwa chete nekuitisa mutsara wekuongorora, yekutanga iyo inonzi spermogram. Chikonzero chikuru chinowanzowedzera kusakwana kwepermatozoa kana kuti nhamba shomanana.
Zvikonzero zvakawanda zvekushaya vana zvinorapwa - saka usaora mwoyo mberi kwenguva. Ndiwo chete nyanzvi yekodzero inodiwa, uyo anonyatsoziva zvinokonzera uye anorayira kurapa kwakakwana.