Ukuhlukunyezwa okuningi kubangelwa ukungalingani kwe-chromosomal
Ukungajwayelekile kwe-Chromosomal kuyisifo esivamile ekukhulelweni kokubeletha nokubeletha. Njengoba kunikezwa ukuthi izinsana eziningi zizalwa ngezimo zofuzo ezifana ne-Down Syndrome nezinye izidakamizwa, kungani ezinye ze-chromosomal ezingavamile ziholela ekukhulelweni kwesisu?
Izizathu Ezenzekayo nge-Chromosome-Related Causes of Marriage
Kuwo wonke ukuphuphuma kwesisu kudala, ukungalingani kwe-chromosomal kubhekwa njengesizathu esivame kakhulu sokuthi kungani ukukhubazeka kwenzeka.
Kulinganiselwa ukuthi noma yikuphi phakathi kwamaphesenti angama-40 no-75 kuwo wonke ama-miscarriages abangelwa izinkinga ezingenangqondo ze-genetic kumntwana okhulayo.
Ezimweni eziningi, ososayensi abazi ukuthi kungani i-chromosomal engavamile iholele ekukhulelweni kwegazi. Enye inkolelo yokuthi isimiso somzimba sokuzivikela sikamama siyabona inkinga ezinganeni zomzimba ezisathuthuka futhi ngaleyo ndlela iphetha ukukhulelwa.
Enye inkolelo ukuthi ingane ekhulayo ifika ekugcineni lapho inkinga ethize yofuzo idala umntwana ukuba ayeke ukukhula. Ezinye izakhi zofuzo zingase zilahleke okudingekayo ekuthuthukiseni okuqhubekayo, noma amakhophi engeziwe amakhemikhali athile angabangela umntwana noma i-placenta ukuba ikhule ngendlela engafanele. Lokhu kungase kuchaze ukuthi kungani ezinye izinhlobo ze-chromosomal ezingavamile ziholela ekukhulelweni kwesisu kanti abanye bengenzi.
Impendulo elula ukuthi "kwenzeka nje." Ukuhlukaniswa kweselula kuyinkimbinkimbi eningi ngezinto ezingahamba kahle, ngakho-ke kulandela ukuthi ngezinye izikhathi izinto zihamba kahle.
I-sperm noma i-egg cell ingagcina nenombolo engafanele yama-chromosomes noma ngama-chromosomes enezingcezu ezingekho noma ezengeziwe, ekugcineni eziqhubekayo ukudala izinkinga ezifana nokukhulelwa kwesisu, ukubeletha noma izifo eziphathelene nokuzala.
Izingozi Zezingozi
Esikhathini esiningi, abesifazane abakhulelwe okukodwa abathintekayo nge-chromosomal abonakalayo bazoqhubeka nokukhulelwa okuvamile kusukela ezindabeni ze-chromosomal zihlelekile ngokungahleliwe emvelweni.
Ukukhubazeka kwe-Chromosomal ngokuvamile akuphindaphindi ngaphandle uma abazali ababili noma bobabili bengenawo ama-translocation olinganiselayo noma impikiswano efanayo yezofuzo.
Ubudala bomzali yingxenye eyodwa engozini yokukhulelwa okwenziwe yizinto ezingavamile ze-chromosomal. Emibhangqweni lapho umama engaphezu kweminyaka engama-35, ingozi yokukhulelwa kwesisu ikhula futhi ubukhulu bezinto ezingavamile ze-chromosomal kubonakala sengathi buphakeme. Kwabesilisa, iminyaka lapho izinga lokukhulelwa kwamaphesenti likhuphuka akucacile kodwa cishe lizoba neminyaka engaphezu kwengu-40 ubudala.
Abacwaningi baphenya ezinye izici ezingozini zokukhubazeka kwe-chromosomal, kodwa idatha ayiqinisekisi. Isibonelo, ukwehliswa kwamakhemikhali anobuthi kungandisa ingozi ye-chromosomal engavamile, kodwa ubuhlobo obuqondile abuqondakali kahle.
Uma uzama ukukhulelwa futhi uye wahlangabezana nokuhlukumeza okuningi ukuthola ukuhanjiswa kumchwepheshe wezolimo noma ukuphela kwengqondo yokuzala. Ukuhlola okuqhubekayo kwezakhi zofuzo kungasiza ukunquma noma yiziphi izinkinga ezingezansi wena noma umlingani wakho ongase anakho. Uma kunenkinga ekwenzeni izakhi zofuzo noma amaqanda wakho, ubuchwepheshe bokuzala bokusiza, njengokuhlola i-embryo ngaphambi kokufakelwa, kungakusiza ukufezekisa ukukhulelwa okusemandleni.
> Imithombo:
UGenuis, uStephen J. "Izinkinga zezempilo kanye nemvelo-i-paradigm evelayo yokuhlinzeka ngempilo yezinkinga ezithintekayo nezomzimba." Ukukhiqizwa Kwabantu NgoJuni 2006 2201-08. Ifinyelele ngo-25 Nov 2007.
UHanke, W. noJurewicz. "Ingozi yezinkinga ezikhungathekile zokuzala nokuthuthukiswa ngenxa yobungozi bokubulala izibulala-zinambuzane: ukubuka ngokucacile ubufakazi obukhona be-epidemiological." I-International Journal of Occupational and Medical Medical Environmental 2004 223-43. Ifinyelele ngo-25 Nov 2007.
USlama, Remy, Jean Bouyer, Gayle Windham, uLaura Fenster, no-Axel Werwatz noShanna H. Swan. "Ithonya lobudala be-Patater engozini yokukhipha isisu." I-American Journal of Epidemiology 2005 816-23. Ifinyelele ngo-25 Nov 2007.