Nhamba yekubereka, iyo inonziwo kuwedzera kwekuberekera chiyero, ndiyo inonyanya kuyerwa yekuzvarwa kwenharaunda mune imwe nyika kana nyika. Iyo inoratidzira kuenzanisa nhamba yevanogona kuberekwa mumukadzi wese wezera rekubereka, pasinei nekunze kwezvinhu uye kufa. Nhamba yekubereka inoratidza kushanduka kunogona kuitika muhutano hwevanhu venyika.
Chirevo chekuwedzera kwekubereka
Kuverenga chiyero chekubereka, nhamba yevana vakaberekerwa panguva imwe nguva inofanira kugoverwa nenhamba yevakadzi vane makore 15-49 (kuberekwa kwezera) uye yakawedzerwa nemakore 1000. Chiyero chekubereka chinowanikwa mu ppm (‰).
Nokufa kwechidiki zvakaderera kwekugadziriswa kwezvizvarwa, chiyero chekubereka chizere chinofanira kunge chiri pamwero we 2.33. Kana huwandu hwekubereka huri kupfuura 2.4 - izvi zvakanyanya kubereka, pasi pe 2.15 - pasi. Nhamba yekubereka yevana vaviri mukadzi mumwechete inonzi inhengo yekubereka. Chiyero chikuru chinoratidzira matambudziko ezvinhu zvakakosha kuvabereki vane chokuita nekudzidzisa uye kutsigira vana vavo. Kusabereka zvishoma kunobatsira kukwegura kwevanhu uye kuderedzwa kwenhamba yacho.
Kubereka nenyika dzepasi
Maitiro ehuwandu hwekuberekwa kwehuwandu hwepasi redu huri mukugadzirisa kwehupfumi. Zvinosuruvarisa, zvinotarisirwa kuti izvi zvichange zvichienderera mberi, zvisati zvadarika makore makumi matatu anotevera. Nokudaro, somuenzaniso, kubereka muRussia kwasvika kumwero we 1.4 uchifunga nezve vagari veCaucasus, nenzira yekare "yakawanda". Uye mufananidzo wakafanana muUkraine watova 1.28. Kunyange pasi pehuwandu hwekubereka pakati pevaBelarusian inongova 1.26 pamamiriyoni.
Chiyero chekubereka mbeu
Muzhinji, kuderera kwekubereka kunoonekwa munyika yose. Zvizhinji zvezviitiko izvi zvinowanikwa mune dzimwe nyika dzokudhinda dzeWestern Europe, dzinoratidzwa nekuderera zvishoma nezvishoma muhuwandu hwevanhu.
Munguva iyo kubva muna 1960-2010, chiyero chekubereka pasi rose chakawira kubva kubhuku rekuzvarwa 4.95 kusvika ku 2.5648 pamukadzi. Munyika dzakabudirira zvikuru, kubereka kwakadaro kwakanyorerwa kare muma1960, uye muna 2000 yakange yasvika ku 1.57. Iye zvino chiyero chekubereka kuderera pasi rose chiri muSingapore (0.78), uye chinonyanya kukosha muNiger (7.16).