Vitrification amaqanda

I-Vitrification yamaqanda kuyindlela efakazela ekulondolozeni i-biomaterial isikhathi eside, okuyinto nganoma isiphi isikhathi ingasetshenziswa i-IVF. Ukuqanda amaqanda kwenziwa ngendlela yokuthi isilwane segciwane asishintshi ngesikhathi sokugcina isikhathi eside. Lokhu kutholakala ngokusebenzisa ukubizwa okuthiwa ama-cryoprotectants, okunciphisa kakhulu umphumela wokushisa okuphansi kuma-organelles wegciwane lesigciwane. Ngenxa yeqhwa elinjalo, ukwakhiwa kwamakhekhedi e-ice akhishwe. Ake sicabangele le nqubo ngokuningiliziwe.

Umlando we-vitrification indlela

Kumele kuqashelwe ukuthi ukusetshenziswa ngale ndlela ngezikhathi ezithile kwanda iphesenti lamaqanda okusinda emva kokulimaza. Ngesikhathi esifanayo, cishe amaphesenti angama-90 azo zonke izinhlobo zamagciwane anemigomo emihle kakhulu ye-morphological, okwenza kube lula ukuyisebenzisa ku-IVF.

Ngaphambi kokubuyela enkambeni yale nqubo, kubalulekile ukukhuluma ngomlando wokutholakala kwalendlela yokulondoloza amangqamuzana omzimba womzimba wesifazane.

Lolu buchwepheshe lweqhwa lokuqanda amaqanda lwakamuva nje, lapho izwe lathola ushintsho lwezinkulungwane zeminyaka - ngo-2000. Umbhali walolu lwazi wayengudokotela waseJapan uMasashige Kuvayama. Kusukela ukusetshenziswa kokuqala kwesilingo salendlela yokulondolozwa kwe-biomaterial, inqubo ye-vitrification iye yenziwa okungenani isigamu sezikhathi eziphindwe kwezigidi emitholampilo engaphezu kuka-1000 ehlukene emhlabeni jikelele. Ingane yokuqala ngenxa yokukhulelwa kweseli yesifazane eqinisekisiwe yazalwa ngo-2002 eJapane. Okuhlangenwe nakho kozakwethu baseJapane kwasetshenziswa abaseMelika, ngonyaka olandelayo (2003).

Njengamanje, le ndlela ithole ezinye izinto ezintsha, futhi ithuthukisiwe kakhulu. Ngenxa yezixazululo zanamuhla zokwelapha, iqanda manje lingagcinwa iminyaka engaphezu kwengu-100.

Amaqanda afriziwe kanjani futhi agcinwe kanjani?

Inqubo yokuqandisa i-biomaterial ilandelwa yinkimbinkimbi yezifundo ezihlose ukusungula ikhwalithi lamaqanda omnikeli wesifazane. Emva kwalokhu, baqala inkambo ye-hormone therapy, ukugqugquzela, okubizwa okuthiwa i-superovulation - inqubo lapho amangqamuzana amaningana ocansi avuthiwe ngesikhathi esifanayo angena emgodini wesisu. Ngalesi sikhathi, ukuqapha ngokusiza amadivaysi e-ultrasound amaqanda avuthiwe kwenziwa ngokuhlolwa kwekhwalithi yabo.

Ukukhetha amangqamuzana omzimba afanele kunawo wonke ukuze kwenziwe inqubo, udokotela wenza i-puncture, lapho kuqoqwa khona amaqanda. Izinto eziqoqiwe zifakwa kwisisombululo esikhethekile. Ngemuva kwalokho, qhubeka nenqubo ye-Vitrification.

Le ndlela isebenzisa ukusetshenziswa kwe-nitrogen enamandla njenge-ejenti yokuqhwaza, izinga lokushisa okungaba ngu-196 degrees. Ku-capsule nayo ukuthi amaqanda aqoqwe afakwa.

Yiziphi izinzuzo zalolu buchwepheshe futhi zingenziwa nini?

Njengoba kuyaziwa, kubo bonke abesifazane, cishe eminyakeni engama-35-40, ukwehla komsebenzi wokuzala kubonakala. Ngakho-ke, izilonda zezocansi zilahlekelwa umsebenzi wazo, umsebenzi wabo ubi kakhulu. Yingakho abesifazane kule minyaka beqala ukubhekana nezinkinga zokukhulelwa. Ngokwezibalo, cishe eminyakeni engama-35, abesifazane abanamaphesenti ayishumi kunama-oocyte aphelele emzimbeni kusukela ekuzalweni. Ngesikhathi esifanayo, ikhwalithi yamagciwane e-germ futhi ehla.

Yingakho iqoqo lamaqanda, i-vitrification kanye nokugcina isitoreji ku-cryobank kuyindlela enhle kakhulu yabesifazane, ngenxa yezizathu ezithile, abakwazi ukuba nengane okwamanje (izifo zesimiso sokuzala, izinqubo zezinto eziphilayo, njll).

Uma sikhuluma ukuthi iqanda lingamaqanda kangakanani, ama odokotela athi le nqubo ingenziwa kuze kube yiminyaka engu-41. Kodwa-ke, kufanele kukhunjulwe ukuthi uma uneminyaka yobudala, inani lamaqanda afanelekayo elingu-vitrification liyancipha.