Iqanda lomntwana liyi-embryo kunye neengubo zobomvu. Eli xesha lokukhulelwa liyinqanaba lokuqala lokukhulelwa. Yaye yonke into iqala ngokuqhagamshelana kweeseli ezimbini - ibhinqa kunye nendoda.
Emva koko, iqanda elikhulelweyo liqala ukuhlula ngokukhawuleza, ekuqaleni kweengxenye ezi-2, ukuya kwi-4 njalo njalo. Inani leeseli, njengobungakanani bembungu, likhula njalo. Kwaye lonke iqela leeseli eliqhubeka lihlula, ludlulela kwi-tube fallopian ukuya kwindawo yokufakelwa kwayo. Eli qela leeseli liqhamo leqanda.
Xa sele ufikelele umnqweno, iqanda le-fetal lifakwe kwisinye seendonga zesisu. Oku kwenzeka emva kweveki emva kochumiso. Kuze kube kweli nqanaba iqanda lomntwana elityayo londla izinto eziseqanda ngokwayo. Kwaye emva kokungeniswa kwisibeleko, isondlo senziwa yi-mucosa yayo evuvukileyo, eyenzelwe inkqubo yokondla nokuphuhlisa imbungu kuze kufikelelwe ukwakheka kwe-placenta.
I-placenta, okanye indawo yomntwana , ivela kwinqanaba langaphandle leqanda lomntwana, elixutywe nge villi. Ezi villi kwindawo yokuqhotyoshelweyo kweqanda le-fetal kubhubhisa inxalenye encinci ye-uterus ye-mucous, kwakunye neendonga zeemivenge zegazi, zizalise ngegazi kwaye ziphonsa kwindawo elungiselelwe.
Iqanda lomntwana ngumqondiso wokuqala wokukhulelwa okuqhelekileyo. Ingabonwa kwi-ultrasound emva kweveki ezimbini zokuya esikhathini. I-embryo ibonakala kuphela kwiveki yesi-5 yokukhulelwa. Kodwa ukuba ngeli xesha ugqirha ugxininisa ukungabikho kombungu kwiqanda lomntwana-ngamanye amagama, iqanda elingenalutho lomntwana, i-ultrasound iphinda iphindwe emva kweeveki ezimbalwa.
Ngokuqhelekileyo kwimeko enjalo, kwiiveki ezi-6 ukuya ku-7, i-embryo ne-palpitation ziqala ukuboniswa. Ukuba iqanda le-fetal lisenanto, oku kubonisa ukukhulelwa okungaphuthunyanga. Ukongezelela kule nkxalabo, kwiimigangatho zokuqala zokukhulelwa, kunokubakho abanye - isimo esingavumelekanga seqanda lomntwana, indawo yalo engafanelekanga, i-detachment, njl.
Yingakho kubalulekile ukugqithisa i-ultrasound ngokukhawuleza ukuze ukwazi ukutshintsha imeko ukuba iyakwazi ukulungiswa. Emva koko, kwi-trimester yokuqala umngcipheko wokukhulelwa komzimba, i-detachment kunye nezinye izifo ezinzima. Kodwa okwaneleyo malunga nokubuhlungu.
Iqanda le-fetal kwiiveki zokuqala zokukhulelwa linomfanekiso we-oval. Kwaye i-ultrasound ivame ukuhlola ububanzi bayo obuphakathi-i-SVD yeqanda le-fetal. Ekubeni ububanzi beqanda le-fetal litshintsha, kukho impazamo ekuqaliseni ixesha lokuthathwa kwesigxina kulo mqondiso we-fetometric.
Ngokomyinge, le mpazamo iiveki eziyi-1.5. Ixesha lokugaya, njengomthetho, lugqithiselwe kungekuphela kolu lathisi, kodwa kwakhona ixabiso le- CTE yesisu (ubukhulu beparietal size) kunye nezinye iiparameter zisetyenziswa.
Ubunzima beqanda lomzimba ngeveki
Ngoko, ubungakanani beqanda lomntwana ngeveki. Ukuba iqanda le-fetal linama-4 mm ububanzi, oku kubonisa ixesha elifutshane kakhulu ukuya kwiiveki ezingama-6. Inokwenzeka ukuba, ngoku iqanda le-fetal lihambelana nexesha leeveki ezi-4. Kwiiveki ezi-5, i-SVD ingama-6 mm, kwaye kwiiveki ezingama-5 kunye neentsuku ezi-3 i-egg fetal inomlinganiselo we-7 mm.
Kwiiveki ezingama-6, iqanda le-fetal likhula lifikelela kwi-11-18 mm, kwaye ububanzi bendawo yangaphakathi yeqanda lomntwana eli-16 mm lihambelana nexesha leeveki ezingama-6 kunye neentsuku ezi-5. Kwiiveki ezi-7 zokukhulelwa, i-SVD ibanga ukusuka kwi-19 ukuya kwi-26 mm. Kwiiveki eziyi-8 iqanda le-fetal likhula lifikelela kwi-27-34 mm, kwiiveki ezili-9 ukuya ku-35-43 mm. Kwaye ekupheleni kweiveki ezili-10 i-egg fetal inokulingana nobubanzi obungama-50 mm ububanzi.
Kumbuzo - ngokukhawuleza ukuba iqanda lomntwana likhula kangakanani, sinokuthi ngokuqinisekileyo: kude kube ngamaviki angama-15 ukuya kwe-16 ubukhulu bayo bunyuke ngo-1 mm imihla ngemihla. Ukongezelela, ubukhulu beqanda lomntwana lukhuphuka ngo-2-2.5 mm ngosuku.
Imigangatho yobungakanani beqanda lomntwana kunye nefubus linokulandelwa ngokwetafile.