Isonto le-3 lokukhulelwa

Siyaqhubeka nekhasi lethu elikhethekile le- «Pregnancy Week by Week»: ngemuva isonto 1 y the 2, sifika ekukhulelweni. Enye yezinqubo ezinhle kakhulu futhi ezithakazelisayo emvelweni ngokungangabazeki ukukhulelwa. Ngale kwesithombe sakudala sokuhlangana phakathi kweqanda nesidoda, ungathanda ukwazi ukuthi le nqubo ihlanganisa uchungechunge lwezinyathelo ezimangalisayo esingakaze sitshelwe ngazo ekilasini, nokuthi “Madres Hoy” sifuna ukukuvezela.

Sikulowo mdanso wamakhemikhali ophelele lapho amangqamuzana amabili ezocansi noma ama-gametes azoshintshanisa ama-chromosomes awo, kepha hhayi ngaphambi kokwenza umjaho ongcono futhi onekhono kakhulu lapho isidoda esisodwa sifinyelela lelo qanda. Okwenzekayo ngokulandelayo kuphethe imfihlakalo enkulu nenselelo enkulu yesayensi, lapho lapho amaseli amabili amancane angena ochungechungeni lwezinguquko ukuchaza kancane kancane lokho esikubiza ngokuthi "impilo". Siyakuchazela.

Isinyathelo ngesinyathelo sokufaka umanyolo

Ubuwazi ukuthi iqanda lingaphezudlwana nje kuka-0.135 ml ububanzi? Isidoda sincane kakhulu, futhi empeleni, kungaba nesidoda esiphakathi kwezigidi eziyi-120 nezingama-600 ekujuleni ngakunye. Manje, kepha phakathi kwabo bonke, cishe kuphela ama-500 azofinyelela kuleso sigaba lapho ukukhulelwa kuzokwenzeka khona.

Ake sibone isigaba ngasinye salo.

Uhambo olude luyaqala.

Le adventure iqala lapho isidoda sifakwa esithweni sangasese. Le ndawo akuyona indawo emnandi, i-asidi kakhulu futhi ngakho-ke isidoda siyaphoqeleka ukuthi sifune indawo ene-alkaline ethe xaxa, ngaleyo ndlela sidlule kwesibeletho kuya amashubhu fallopian emahoreni ambalwa.

Uma usufike kumashubhu we-fallopian, isidoda singaphila amahora angama-48 kuye kwangu-72. Ngakho-ke, ukuvundiswa kungenzeka phakathi kwezinsuku ezimbili noma ezintathu ngemuva kokwenza ucansi.

Kukulesi sifundo lapho ingxenye enkulu yalezo zigidi zesidoda ilahlekile, kwehliselwa kwabambalwa abanenhlanhla abazongena kulwelwesi.
kweqanda ukunikeza indlela yokukhulelwa.

Phakathi nalolu hambo, isidoda sizwa ukulahleka okuyingxenye yolwelwesi lwamakhanda abo.. Lokhu kungenxa yesizathu esisemqoka kakhulu sokufuna ukwazi: ukuze kuqale uchungechunge lokuphendula kwamakhemikhali ukuze kudlule i-ovule.

Ukungena komqhele okhanyayo

Ukuqonda kangcono i- izigaba zokukhulelwa dKumele sicabange i-ovule njengenhlobo ye-capsule evikelwe ngokulandelana ngezendlalelo ezahlukahlukene. Omunye wabo, ongaphandle kakhulu umqhele okhanyayo noma okhanyisiwe.

Umqhele okhanyisiwe wenziwa izingqimba eziningana umsebenzi wazo ukunikeza amaprotheni esibelethweni.
Isidoda sifika lapha ukuze siqale inqubekela phambili eyinkimbinkimbi kuwo wonke amaseli alandelanayo ezungeze lesi sakhiwo. Bayakwenza ngenxa yohlobo lwe-enzyme ebavumela ukuba bavule imigudu ehlukahlukene. Kuwumzabalazo impela!

Ukufika ku-zona pellucida

Isidoda sesivele sidlulile kwi-corona radiata futhi manje sesiku- umgoqo wesibili okumele bawele. Bazokwenza kanjalo ngenxa yohlobo lwe-enzyme oluzoveza izinguquko esidunjini uqobo, kubangele lokho okwaziwa ngokuthi yi-acrosome reaction.

Kulesi sigaba, akuyona yonke isidoda esizosabela ngale ndlela. Umgomo wokugcina wuhlobo oluthile lwesakhiwo ukuthi luvele: the intambo ye-acrosomic- Inhloso yayo? Kulula kakhulu, thinta ulwelwesi lweseli leqanda. Isinyathelo sokugcina ...

Ukuhlanganiswa

Noma ngabe isidoda esincane kuphela esifinyelele ku-zona pellucida, le mpi yokusinda kanye ne-enzymatic reaction izovumela inhlanhla ukuthi ibe neyodwa kuphela, lowo ekugcineni angaxhumana nolwelwesi lwe-plasma lwe-oocyte ngenxa yomucu we-acrosomal. Uma lokhu kwenzeka, uchungechunge lwezinguquko ezithakazelisayo luqaliswa:

Izikhumba ziqala ukuxubana ngokusebenzisa izinguquko ezahlukahlukene ze-ionic lapho ukunamathela kwesidoda okuningi ku-oocyte kuvinjelwe.

Ucingo luvele Isigaxa sokukhulelwa, inhloso yayo ukuvumela ikhanda, isiqeshana esiphakathi nomsila wesidoda ukuthi ungene ku-oocyte cytoplasm.

Ukuvundisa kwenzeka lapho i-nuclei fuseKokubili ikhanda lesidoda elifinyelele iqanda neqanda uqobo. Kungaleso sikhathi lapho ingqikithi yama-chromosomes angama-46 ehlangana ndawonye (iseli ngalinye locansi linikela ngama-23), ngaleyo ndlela kwakheka isipho esihle se-chromosome somuntu omusha.

Yize kuliqiniso ukuthi uhhafu wolwazi lofuzo uhambelana nobaba nomama, lInyunyana yakha i- ukudalwa komuntu ohlukile futhi ongaphindeki, okuthi ngalesi sikhathi ibizwa nge-zygote nokuthi emva kwezinyanga eziyisishiyagalolunye zezinguquko, ukukhula kanye nezimangaliso eziyimfihlo esizozichaza ezindatshaneni ezizayo, kuzongena esikhundleni sesidalwa esisha.

Ividiyo elandelayo Kuzokusiza ukwazi okwengeziwe mayelana nokumangala kokukhulelwa:

Sikumema ukuthi uqaphele ukuthola isigaba esilandelayo sokukhulelwa igxathu negxathu ...