Ubudala bentsholongwane kwiiveki ezi-3 zesigxina nje kuphela ngeveki ukususela ekuqaleni kokukhulelwa konke. Iqanda, elalikhuselekile ngokukhuselekileyo, aliyeki ukwahlula kwaye lilandele indawo yokunamathisela kwayo. I-fetus kwisonto lesi-3 lokukhulelwa linomfanekiso we-mulberry, ngoko abanye abanezinyunyi zezilwanyana bayibiza ngokuba yi-morula.
I-fetus kwiveki yesithathu yokukhulelwa
Kancinci kodwa ngokukhawuleza, ukuma kombungu kuya kuba yindiza, kwaye umgca webhola owenziwe ugcwele amanzi. Uluhlu lwangaphandle lujoliswe ukuba luqhotyoshelwe eludongeni lwe-uterine, ngelixa uluhlu lwangaphakathi lujoliswe ukuba lube yidiski ye-embryonic. Ngexesha elithile kamva imbungu iya kuba yincinci, umzimba wayo uya kwandisa kwaye ukwandise kwicandelo eliphantsi. Xa ukhulelwe kwiiveki ezi-3 ubukhulu bomntwana buza kuvumela i disk embryonic ukuba idibanise kwisibhubhu, ngenxa yoko intloko iqala ukuyifumanisa ukusuka ekupheleni kokubanzi, kwaye isuka kumncinci - i-coccyx. Iiseli zesondo sele sele ziqala ukwenza ifom.
Kwiiveki ezi-3 umntwana uqala ukufakela eludongeni lwesibindi, apho i-blastocyst ihlutha i-tissue ephezulu, eyenza ukucindezeleka okuncinci. Le nkqubo ikwabizwa ngokuba yi- implantation kwaye ithatha malunga neeyure ezingama-40. Kulo xesha, ibhinqa liyakwazi ukukhutshwa okuncinci kwegazi, okuqhelekileyo.
Ubungakanani be-fetal kwiiveki ezi-3
Kwiiveki ezi-3, ubukhulu bomntwana bukhula ngokuqhubekayo, obangela ukupheliswa kweendawo zokugcina ngaphakathi. Okwangoku ifika ixesha xa eqala ukuxhomekeka ngokupheleleyo ngamandla omzimba womama,
Ubungakanani bentsholongwane kwiveki yesi-3 yesigxina sinceda ekuveliseni i-hormone ekhethekileyo- progesterone . Nguye onoxanduva lokuvelisa i-mucus ye-uterine ethile, eya kuthi ibe yinto ye-placenta-ilungu lexeshana elibalulekileyo. Ubungakanani bentsholongwane kwiiveki ezi-3 ubude bu-2 mm ubude. Iqukethe malunga neeseli ezingama-250, ezahlukana ngokukhawuleza.
Eli bhinqa ngokungafaneki acinge ngaluphi uhlobo lweziqhamo kwiiveki ezi-3, kuba engayazi malunga nesimo sakhe esitsha.