Iveki yesithandathu yokukhulelwa ifike. Kusuka kweli nqanaba kubasetyhini abaninzi baqala isicidosis sokuqala: isicupunu kunye nokuhlanza kusasa, ukutshintsha ingcamango, umnqweno wokutya into enetyuwa. Ubudala bomntwana kwiiveki ezingama-6 zesiganeko kuphela kwiiveki ezi-4 (njengoko ukuchumisa kubakho iiveki ezimbini emva kokuqala kwexesha lesithintelo). Umama ozayo mhlawumbi unomdla wokufumanisa ukuba yintoni imbungu engama-6 eveki ubudala, indlela ibukeka ngayo kwaye ikhula.
Ukuveliswa kwembungu kweeveki ezintandathu
Ukuba ukhumbule, iveki eledlule ibhungu libukeka lifana nethubhu elingenalutho. Ekupheleni kweveki yesithandathu, i-tube ye-neural ye-embryo iqiniswe. Le ngenye yezona zihlandlo ezibaluleke kakhulu zokukhulelwa: ukuba ukuvalwa okupheleleyo kungenzeki, umntwana unokuzalwa ngokuxhatshazwa kolukhulu. Izazinzulu zakwazi ukubonisa ukuba i-folic acid inempembelelo enkulu kwinkqubo ye-neural tube formation. Yingakho i-obstetrician-gynecologists kwihlabathi lonke iyalungiselela isidlo se- folic acid ngokukhulelwa nokukhulelwa kwabafazi-i- dosage ibaluleke kakhulu ukugcina kakuhle.
Emva kokuvala intloko ekupheleni kwesikhokelo se-neural, ukubunjwa kwengqondo kunye nomgudu womgogodla uqala. AmaSomites, awakhiwe ngeveki evelayo, ngokuthe ngcembe aqale ukuguqulwa kwikholam ye-vertebral kunye neembambo. Kubonakala ngowokuqala, njengamanje, amathambo. Ngeveki yesi-6 yokukhulelwa, umbungu ufumana izixhobo zeengalo nemilenze. Ngoku iinjongo ezizayo zibukeka ngathi zinamaqhina amancinci, kunye nezibambo zibonakala kancane phambi kwemilenze kwaye zenze ngokukhawuleza.
Kwiintsuku ezingama-5-6 ukuya ku-5-6 sele sele ibetha i-small, ayikho ipethe, i-intliziyo. Nangona ikhulile kwaye ibonisa ityhubhu ephihliweyo, isele ikhupha, ichithe igazi legazi kwi-placenta. Inkunzi yentliziyo yesibhozo ngeveki 6 isele ibhaliswe ngokuncediswa kwintsholongwane ye-ultrasensitive ultrasensitive.
Ukongezelela, iimbungu zeeveki ezi-6 ziqala ukwenza i-intestine, zikhona izidalwa zamalungu ebalulekileyo (imiphunga, isibindi, i-thyroid kunye ne-pancreas). Kwimiqolo yentloko yenziwe izitho zengqondo: izikhwebu zeendlebe kunye neembonakaliso ezibonakalayo - iindlebe kunye namathambo esizayo. Nangona umntu onjalo engekabikho, kukho iingcambu zomlomo kunye neempumlo. Iintambo ze-vocal, indlebe yangaphakathi, i-retina kunye ne-lens kweso.
Umbungu wee-6-7 iiveki awukho ngaphezu kwama-berberry okanye irayisi zerayisi: ubude balo ukusuka kwithsaba ukuya kwi-coccy nje ngu-2-4 mm kuphela. Indoda encinci ihamba kwi-amniotic fluid, umthamo wayo u-2-3 ml. Udibaniswe nomama ngekhanda lomlenze kunye ne-placenta yexesha elizayo, eliselikhulu kunomntwana ngokwawo.