Kunamagama amaningi ahlobene nokukhulelwa, futhi kungenzeka wazi eziningi zazo. Omunye wemigomo abazali abaningi abazi ukuthi yi-Trend Trend. Kuyini umkhuba wezwe futhi kungani kukhona ukukhathazeka mayelana nezinguquko kule nkinga njengoba kuhlobene nokukhulelwa eminyakeni yamuva? Thola incazelo yalokhu mkhuba kanye namandla angaphandle awathonya ngalesi sibuyekezo.
Incazelo
Isimo sezwe sibhekisela eminyakeni yobudala yobushudo ekunciphiseni ngokuhamba kwesikhathi. Kusukela ngo-1900 e-United States, kubonakala sengathi ukukhulelwa kwenzeka cishe ezinyangeni ezine ngaphambili nangaphezulu kweminyaka eyishumi edlule. Ukudla okunomsoco kungadlala indima yokuthi kungani lokhu kwenzeka. Ukuqala kokukhulelwa emazweni aseNtshonalanga njengama-US, isibonelo, ngokuvamile kuphakeme eminyakeni eminingi kunayo emazweni asathuthuka.
Kodwa kwezinye izimo, ukuguga kwenzeka esikhathini esiningi kakhulu, njengokuthuthukiswa kwebele okuvela ezinganeni ezineminyaka eyisikhombisa noma ezinganeni zasenkulisa, zombili ezenzeke ngokusho kombiko we-2015 ku-Scientific American.
Ososayensi baphikisana ngokuthi ngabe isimo somhlaba siyaqhubeka yini. Abanye bathi umkhuba wezwe kungenzeka ukuthi wawunqotshwa ngawo-1970. Kunobufakazi, kodwa-ke, ukuthi amantombazane okwamanje abhekene nokuthuthukiswa kwesifuba sangaphambili kanye nezinye izibonakaliso zobushakama obunempilo kunamashumi eminyaka adlule.
Kungakhathaliseki ukuthi iminyaka yobudala (i-menarche) iyaqhubeka nokunciphisa isaphikisana.
Izimbangela Zokukhulelwa Zenzeka Ngaphambili
Kunezizathu eziningi zokuthi kungani kuqala ukukhulelwa kwenzeka-kuhlanganise nokukhuluphala ngokweqile, ukwengeza ama-hormone ezidlweni kanye namakhemikhali emikhiqizo yezinwele nezinhle. Izimbangela zengqondo, njengokungabikho kukababa noma ukubhekana nesenzakalo esibuhlungu, nazo zithweswe icala lokunciphisa isimo somhlaba.
Ngemuva kweminyaka engama-1970, izinga lokukhuluphala ngokweqile ezinganeni alizange likhule nje kuphela kodwa manje liphindwe kathathu kulokho okwakusetshenziswa. Ngo-1980, isibonelo, amaphesenti angu-7 kuphela ezingane ayeneqile, kodwa namuhla, cishe amaphesenti angu-20 ezingane abhekwa njengobunzima ngokweqile.
Kungani ukukhuluphala kubangela ukukhulelwa ukuba kwenzeke ngaphambili? Impendulo ilula: Amangqamuzana amafutha enza i-estrogen. Ngenxa yokuthi i-estrogen inqanda ukukhulelwa kwentsha ekugayeni, amantombazane ngokweqile nakakhulu kakhulu angaphumelela ekufikeni kwentsha eminyakeni engaphansi kwamantombazane angacatshangwa ukuthi ayeneqile.
Ngisho namantombazane ezisindo ezijwayelekile abhekana nokukhulelwa ngaphambili, noma kunjalo. Abacwaningi baye basola amakhemikhali abizwa ngokuthi abaphazamisi be-endocrine. Izibonelo zabaphazamisi ezinjalo zihlanganisa i-bisphenol-A, etholakala kuma-plastiki, kanye nama-pesticides nama-biphenyls amaningi. Bonke baziwa ukuthi bane-effect efana ne-estrogen emzimbeni.
Okugxile ekuqaleni kokuqala kokubeletha kusemantombazaneni, kodwa ezinye izifundo zibonisa ukuthi abafana baqala nokukhulelwa ekuqaleni. Kubonakala sengathi beqala uhlelo lokuvuthwa ngokomzimba ezinyangeni eziyisithupha kuya eminyakeni emibili ngaphambili kunokuba babe namashumi ambalwa eminyaka edlule.
Imiphumela
Umkhuba wokuziphilisa unemiphumela ebalulekile yezinto eziphilayo nezingokwengqondo abazali okufanele bazi ngakho.
Ukuqala ukukhulelwa sekuhlotshaniswe nomdlavuza nezinye izifo.
Izingane ezithola ukukhulelwa zisencane zingase zithinteke kakhulu ngoba zingase zibonise ngokomzimba izibonakaliso zokuvuthwa kanti zingakabi ngokomoya ngokomoya. Abantu abadala nabangane, noma kunjalo, bangase baphathwe njengokungathi bakhulu kunalokho abakhona. Ngaphezu kwalokho, izingane ezithola ukukhulelwa zisencane zingase zibe nokuhlukumeza izidakamizwa nokuphuza utshwala noma zibe nobulili ngesikhathi esincane.
Imithombo:
Biro, Frank M., et al. (2010). Indlela yokuhlola yomshuwalense kanye nezici zokuqala ezifundweni zamantombazane. Izingane zokwelapha. Ibuyiselwe ngo-Agasti 13, 2010:
Walvoord, Emily C. Isikhathi sokukhulelwa: Ingabe siyashintsha? Ingabe kunendaba? I-Journal ye-Health Adolescent. 2010. 1-7.