Ukukhulelwa kuyindlela emangalisayo yokusebenza ngokwenyama eyenzeka kumzimba wesetyhini.
Ubude beli nqubo bubalwa ngeendlela ezahlukeneyo. Kwinqanaba lekhaya lwamkelwe ukuba lilinge ngeenyanga. Ukukhulelwa kuthatha iinyanga ezili-9 zekhalenda. Kwimichiza, inkqubo yesilinganiselo echanekileyo yamukelwe. Ixesha elipheleleyo lophuhliso lwe-intrauterine lomntwana luhlukaniswe ngamagatya (amanyathelo) ngeiveki. Inkqubo yesilinganiselo yeveki ivumela ukuzimisela okuchanekileyo kwexesha elibalulekileyo lokukhula komntwana.
Ukukhulelwa komzimba kuqhubeka iiveki ezingama-40 ± 2.
Ngokwekhalenda ye-intrauterine yophuhliso lomntwana, unokubeka iliso kwinkqubo kwi-dynamics. Ibonisa kwindlela yetafile inkqubo yokuphuhliswa kwezitho zamathambo iiveki kwaye ibukeka ngale ndlela ngendlela elandelayo.
Masiqwalasele ngakumbi iinkqubo zokuphuhliswa komntwana kwiiveki.
Isatifiketi yophuhliso lwe-Fetal ngeveki
- Iiveki 1-4. Kwiiveki zokuqala zophuhliso lomntwana ubizwa ngokuba ngumbungu. Iqanda elityalwe ngokukhawuleza lihlula kwaye lifike kwisibeleko ngosuku lwesithathu. Emva koko umbungu unamathele kwiindonga zawo zesisu kwaye uqhubeka ukhona njengembungu. Ukuphuhliswa komntwana (engumntwana osemva) kwiiveki zokuqala zokukhulelwa kuqala ngokuqulunqa ityhubhu ye-neural, engento engaphezu komgca we-spinal cord kunye nengqondo. Iveki yesithathu kukubeka ukuphefumula, ukugaya, ukujikeleza kunye nezinye izixhobo zomzimba. Amathumbu, iimiphunga kunye nesibindi zibekwe kwiveki yesine. Umlenze wenziwa.
- 5 ngeveki . Ukuphuhliswa kwenkqubo ye-fetal kunye nezitho ziyaqhubeka. Isibindi siqala ukusebenza.
- 6 ngeveki. Uqala ukuguqulwa kwamehlo, ukubonakala kweendlebe kunye neentonga. Iimitha ziqala ukwahlula zibe zihlwele, izibonda, amahlombe, izigqoko, iintende, iinyawo. Ingqondo iqala ukulawula umsebenzi weentlungu kunye nentliziyo.
- 7 ngeveki. Inkqubo yeethambo ithuthuka. Imihlathi ichazwe. Amehlo aya khuselwa kwiinkulungwane.
- 8 ngeveki. Amasebe eengqondo akhiwa. Umntwana usenokuba usenokusabela ngenye into ephazamisayo ngokunciphisa okanye ukuphoqa. Ekubeni ubuso buqala ukuma iimpawu zokuqala, emilenzeni naseziphatheni zibonakala iminwe.
- 9 ngeveki. Zonke iindawo zentliziyo sele zenziwe. Isiqhamo sinokuhambisa izibambo kunye nemilenze, vula umlomo uze ujikeleze intloko.
- Iiveki ezili-10. Ukubunjwa kwezitho zozalana zomntwana kuqhubeka. Amehlo aphuhliswa ngokupheleleyo.
- Iiveki ezili-11. Ngenxa yokuphuhliswa kwama-receptors, ubukhulu besikhumba banda.
- 12 ngeveki. Umntwana usenokwenza izinto ezihlukahlukeneyo: zithinta intloko yakho, iminwe neenzwane ezivulekileyo, vula uvale umlomo wakho, ususe umunwe wakho.
- 13 ngeveki. I-trimeter yokuqala yokukhulelwa yaphela. Zonke izitho eziphambili zibekiwe. Zonke iindawo zenkqubo yokugaya ziqala ukusebenza.
- 14-15 kwiiveki. Inkqubo ye-excretory iqala ukusebenza. Ukuguqulwa kokusebenza kwengqondo kuvela.
- Iiveki ezili-16. Ukumamatheka kubonakala ebusweni bomntwana. Izinwele zokuqala, i-eyelashes, iinyawo zikhula.
- 17-18 iiveki. I-pituitary, i-pancreatic kunye ne-thyroid ye-gland iyaqala ukusebenza. Kuphucula ukulungelelaniswa kwezinto zokuhamba komntwana.
- 19 ngeveki. Isakhiwo se-vestibular senziwa. Kukho ubungqina buso.
- 20-21 iiveki. Ukuphazamiseka kumntwana kufutshane. Ukugqiba ukubunjwa kwamacwecwe ekhonkwane kunye nee-auricle.
- 22 ngeveki. Iimfumba zenziwe kwaye zizaliswe ngamanzi athile.
- 23 ngeveki. Inkqubo ye-nervous yenza imisebenzi yayo: umntwana angakwazi ukusabela kwi-stimuli yangaphandle.
- 24-25 iiveki. Ukuphuhliswa kwesibindi, amathumbu, nesisu sele kugqityiwe.
- 26 ngeveki. Umntwana uyakwazi ukubonisa inkcazo yayo kunye nezinto ezikhethiweyo.
- Kwiiveki ezingama-27-28 . Izitho zomntwana zijikeleze. Umntwana angasebenzisa intsimbi, ukuva, ukuvumba.
- Iiveki ezingama-29 ukuya ku-30.
- Iiveki ezingama-31. Umntwana uthatha indawo ye "embryo": izibambo eziboshwe kunye nemilenze yangaphambili.
- Iiveki ezingama-32. Kukho ukujika komntwana kwindawo ephantsi kwentloko.
- 33-34 iveki. Ingane ifunda umzimba wayo kunye nehlabathi elikujikelezile kwinqanaba leengcinga. Ukuvuthwa kwemiphunga kuyaphela.
- 35-36 iiveki. Isibindi siqokelela izityezelo zentsimbi kwindawo emandla. Ikhumba liyahlanjululwa.
- 37-38 iiveki. Ingqondo nentloko iyaqhubeka ikhula. Uqokelela amanqatha omdaka, oya kukhusela umntwana kwiinyanga zokuqala zokuphila kwi-hypothermia.
- 39-40 iiveki. Ukuhamba komntwana kuncipha. Ulungiselela ukuzalwa.
- 41-42 iiveki. Abo bangakazalwa ngaphambi kwesi sihlandlo, qhubekani beba namandla kwaye balindele ukuzalwa.
