Kunzima kakhulu kodwa kungenzeka kakhulu ngezinqubo ezithintekayo zokuzala
Izintathu ziyizingane ezintathu ezithathwe esibelethweni ngesikhathi sokukhulelwa okukodwa. Njengamawele, ama-triple namanye ama-multiple multiply order order angenziwa ngezigaba zabo zygosity . Ngenkathi abantu abaningi bejwayele amagama "okufanayo" no "abafowabo" ekuchazeni izimpande, besebenzisa le migomo ukuchaza ukuthi amawele noma kathathu abukeka afana, lokho okubhekisele ngempela ekutheni amafomu atholakala kanjani.
Izintathu eziningi ziyi-trizygotic, okusho ukuthi umuntu ngamunye uvela ku-zygote ehlukile, noma inhlanganisela yamaqanda / i-egg. Zivame ukuchazwa ngokuthi "izimpande" zohlobo futhi zihlanganyele ezifanayo zofuzo ezifana nanoma yikuphi abantakwethu. Kodwa-ke, kuyinto engavamile ukuba izintathu zibe yi- dizygotic , eyenzeka uma amaqanda amabili ehlonywa yi-sperm, kanti elinye lamaqanda akhulelwe ahlukaniswa kabili. Ngokuyinhloko, amabili kwezintathu amamawele e-monozygotic (afanayo), abelana ngezici ezifanayo ze-DNA, kuyilapho ingxenye yesithathu ikhiqizwa ngenye inhlanganisela yamaqanda / i-sperm futhi inezakhi zofuzo ezihlukile ezivela kwezinye izintathu ezimbili.
Izintathu ze-Monozygotic
Akuvamile ukuba kathathu kube monozygotic ngokuphelele, okusho ukuthi zonke izingane ezintathu zakhiwe ngeqanda elilodwa elihlukanisa izindlela ezintathu noma lihlukaniswe kabili bese elinye lezinto ezimbili zihlukaniswa futhi ekugcineni kuholela emibungu emithathu enezici ezifanayo zeDNA.
I-triplets i-Monozygotic ihlale ibulili obufanayo, kungaba bonke abafana noma wonke amantombazane. Amanye ama-triplets e-monozygotic empeleni ama-quadruplets lapho umbungu owodwa usuphelile noma ubuyiselwe kabusha.
Ukukhulelwa kwe-triplet monozygotic kuthatha izingozi zokukhulelwa kwe-monozygotic nge-placenta eyabelwe, kanye nezingozi ezengeziwe zokukhulelwa kwe-triplet.
Ukukhulelwa kwaloluhlobo kungase kuhlangane nezinkinga ezinjenge- pre-eclampsia , isandulela ngculazi , ngisho nokumpontshelwa igazi.
Ngenxa yokungatholakali, ama-triplets afanayo afaka izihloko, isibonelo uma ukukhulelwa kwe-triplet kwe-monozygotic kwabangele ngemuva kokuba umbungu owodwa usungulwe kwinqubo ye-in vitro. U-Allison Penn wazala u-Logan, u-Eli no-Collin ngo-March 2008. Odokotela bakhe babhekene nalesi simo njengento kuphela eyaziwa ngokudluliselwa kwesisu esisodwa okubangelwa ukuthuthwa kwesisu.
Yiziphi izibizo?
Ukucwaninga kuyahluka ngezimo ze-triplets monozygotic. Umbiko we-2012 wesigameko esinempilo wabafana abathathu abafana abathathu abathandwayo ababala ngokuzenzakalelayo ubala izigameko ezi-1 ku-100,000 ezizalwa ngokuzalwa, kanti iningi lamacala abikiwe ayenziwe ngamasu okuzala abasizwa. Leli phepha laphawula ukuthi kunezinye izimo eziyisikhombisa kuphela ezaziwa ukuthi zazithathwa ngokuzenzekelayo. Iphepha le-2015 likhomba izinga lezintathu ezintathu ezivame ukuphindwa izikhathi ezingamakhulu ayisishiyagalolunye nangamacebo okuzala okusizayo kunombono wokuzenzekelayo kodwa namanje awunqabile kakhulu.
Phakathi naleso sikhathi, izilinganiso ezitholakala ohlwini lwabadlali abathandwayo oluphakathi kuka-1 ku-60,000 no-1 ku-200 million. Lokhu kungahle kube ngenxa yezinombolo ezithile ezibonisa isilinganiso sezinhloso / ukukhulelwa kunokuba kube nokuzalwa kwezintathu eziphilayo.
> Imithombo:
> Gandham S, Ogueh O. Ukukhulelwa Kwama-Monochorionic Okuhamba Ngaphandle Kokuzalwa Okungekho No-Fetal Anomaly noma Ukuguqulwa Kwama-Fetal Fetal. Imibiko ye-BMJ Case . 2012; 2012 (nov22 2). i-doi: 10.1136 / bcr-2012-007114.
> Gurunath S, Makam A, Vinekar S, i-Biliangady R. I-Monochorionic Triamniotic Triplets Elandela Ngokuvamile kwi-Vitro Fertilization ne-Blastocyst Transfer. I-Journal of Sciences Yokukhiqiza Abantu . 2015; 8 (1): 54. doi: 10.4103 / 0974-1208.153131.