Abantu benshi bashya mu gutunganya ibara ry’uruhu mu nzu baba bafite amatsiko yo kumenya umusaruro bashobora kwitega nyuma y’icyumweru kimwe bakoresheje uburyo bwo gutunganya ibara ry’uruhu. Gusobanukirwa impinduka zishobora kubaho mbere na nyuma y’iminsi irindwi gusa bishobora kugufasha gushyiraho ibyo witeze bifatika no gutegura gahunda ikwiye yo gutunganya ibara ry’uruhu.
Nyuma y'icyumweru kimwe cyo kwisiga ibara ry'uruhu, abantu benshi bazatangira kubona itandukaniro rigaragara mu ruhu rwabo, ariko ibisubizo biterwa n'ibintu byinshi, birimo ubwoko bw'uruhu, inshuro zo kwisiga ibara ry'uruhu, igihe cyo gukora ibara ry'uruhu, n'ubwoko bw'uburyo bwo kwisiga ibara ry'uruhu bukoreshwa. Ku batangira, icyumweru cya mbere gikunze kwibanda ku kubaka ibara ry'uruhu aho kugera ku ibara ryijimye cyane.
Mbere yo gutangira gahunda yo gusiga ibara ry’uruhu ku buriri, uruhu rusanzwe rufite imiterere yarwo isanzwe kandi rushobora kuba rworoshye kwangizwa n’imirasire y’izuba. Niyo mpamvu abahanga benshi mu bijyanye no gusiga ibara ry’uruhu basaba gutangirana n’imyitozo migufi, akenshi iminota 5 kugeza kuri 7, kandi bakanongera buhoro buhoro igihe cyo gukora imyitozo mu cyumweru cyose. Gahunda isanzwe yo gusiga ibara ry’uruhu mu cyumweru cya mbere ishobora kuba irimo imyitozo 2 kugeza kuri 3, ikamara iminsi myinshi kugira ngo uruhu rushobore kugira melanin buhoro buhoro.
Nyuma y'amasomo make ya mbere, uruhu rushobora kugaragara nk'urw'umukara gato, rufite ibara ry'ubushyuhe, cyangwa rugasa n'umuhondo. Hari abantu bashobora kutabona impinduka zikomeye ako kanya kuko ikorwa rya melanin rifata igihe. Igikorwa cyo gusiga ibara ry'umukara gikomeza ndetse na nyuma y'uko ibara ry'umukara rirangiye, ari nayo mpamvu ibisubizo bigaragara cyane nyuma y'iminsi mike isomo rya mbere ritangiye.
Mu mpera z'icyumweru cya mbere, abantu benshi babona ibara ryoroheje ry'uruhu. Iri bara ry'uruhu ni ingenzi kuko rifasha gutegura uruhu ku nshuro zo kuzaruhinduramo ibara kandi rigagabanya ibyago byo gushya mu nshuro zo kuzaruhinduramo ibara. Ariko, ni ngombwa kumva ko ibara ryijimye kandi ryijimye risanzwe rifata ibyumweru byinshi kugira ngo rikure, atari icyumweru kimwe gusa.
Ubwoko bw'uruhu bugira uruhare runini mu bisubizo mbere na nyuma yarwo. Abantu bafite uruhu rwera bashobora kubona impinduka nkeya z'ibara nyuma y'icyumweru kimwe, mu gihe abantu bafite uruhu ruringaniye bashobora kubona ibisubizo bigaragara cyane. Abantu bafite uruhu rwijimye bashobora kubona ibara ry'uruhu rwabo rito ariko rirushaho kwiyongera.
Hari n'izindi mpinduka ushobora kubona nyuma y'icyumweru kimwe ukoze ibara ry'uruhu. Uruhu rwawe rushobora kumva rwumye gato kurusha uko bisanzwe kuko kwiyahura n'imirasire y'izuba bigabanya ubushuhe mu ruhu. Niyo mpamvu kwiyahura ari ingenzi cyane mu gihe cyo kwiyahura. Uruhu rufite amazi menshi rurushaho kwiyahura neza kandi ibara rikamara igihe kirekire.
Kugira ngo umusaruro urusheho kuba mwiza mbere na nyuma y'icyumweru kimwe, gutegura neza uruhu ni ingenzi. Gukuraho ibara mbere yo gukora ibara rya mbere bifasha gukuraho uturemangingo tw'uruhu twapfuye, bigatuma urumuri rwa UV rwinjira neza. Gukoresha amavuta yo kwisiga mu nzu bishobora no gufasha kunoza umusaruro no gukumira ubwumye.
Ni ngombwa kandi kudasiga ibara ry'uruhu buri munsi mu cyumweru cya mbere. Uruhu rwawe rukeneye igihe cyo gukira no gukora melanin. Gusiga ibara ry'uruhu kenshi bishobora gutera gutukura cyangwa ubushye, bishobora kugabanya igihe cyo gusiga ibara ry'uruhu bigatera umusaruro utari mwiza.
Muri make, ibisubizo byo gusiga ibara ry'uruhu nyuma y'icyumweru kimwe akenshi biba birimo ibara ryoroheje, uruhu rushyushye, ndetse n'uruhu rurushaho kuba rwiza. Nubwo impinduka zishobora kuba zidakabije, icyumweru cya mbere ni intambwe y'ingenzi mu kubaka ibara ry'uruhu rirambye. Guhuza, igihe gikwiye, no kwita ku ruhu ni byo bintu by'ingenzi bigaragaza uburyo umusaruro wawe uzaba mwiza mbere na nyuma y'aho uzabera.
