Iqumrhu le-placental "yindawo yengane" yesikhashana, ekhoyo emzimbeni wesetyhini kuphela ngexesha lexesha lesigxina. Injongo yembonakalo yakhe kukubonelela nge-fetus nayo yonke into efunekayo ebomini nasekuphuhliseni. Xa kwenzeka ukuphulwa emzimbeni, ukungaqiniseki kwamaplazi angapheliyo, oku kungaholela kwiziphumo ezinzima.
Iimbangela zokungapheli komzimba ongapheliyo
Le ntsholongwane ibonakala njengomphumo wesenzo kumzimba kamama wezinto ezininzi ezimbi, umzekelo:
- usulelo kunye no kuvutha;
- indlela yokuziphatha okubi;
- ukungondleki ngexesha kunye nangaphambi kokukhulelwa ;
- ukuxhwaleka kwiindonga zesisu;
- ukusetyenziswa kweziyobisi ezichasene nokukhulelwa nokunye.
Iyintoni ingozi yokungenakulungeleka kwamaplaza?
Ubunjalo bokuxilongwa ngolu hlobo luphawu lwe-alamu, olubonisa ukuba umntwana uqala ukulahla emva kokuphuhliswa, kukho iziphene ekubunjweni kwezitho zangaphakathi, iinkqubo, njalo njalo. Abantwana abazalwa emva kokugqoka okunjalo, banenkxalabo yeenkqubo zesifo, abanakho ukukhusela.
Ukungakwazi ukuphelelwa yintsholongwane ye-placenta kungakhokelela ekufeni kwintsholongwane kwisibeleko okanye eziphene eziphuhlisayo zophuhliso. Ikwahlula ngeendlela ezimbini zokuhamba:
- Ukungafezeki kwamaplazi angapheliyo aphelelwe ngumhlalaphantsi kubonakala ngokuncipha kwimisebenzi yendawo "yomntwana" kangangokuthi umntwana unokukwazi ukufumana izinto eziyimfuneko.
- Ukungafezeki kwamacwecwe okunciphisayo kuthetha ukungabikho komfutho we-oksijini kunye nesondlo, okuvezwa ngumntwana.
Njengomthetho, ukungenakwanela kwe-placental incedise umgaqo ozimeleyo wengxaki ngumzimba wesetyhini kwaye awudingi unyango. Inkoliso yexesha eliqhelekileyo ekusebenziseni izigulane kunezibonelelo ezingapheliyo ezingenasiphelo, ezingabangela umgangatho wesifo sokuqala, okanye umphumo wempembelelo yazo zonke izinto ezifanayo. Ngokuqhelekileyo kwenzeka emva kweveki ye-18 yesigxina.
Kwizinyathelo zomzimba, kukho uluhlu oluthile lweziphene ekusebenziseni ukuhamba kwegazi kwi-"mother-placenta-fetus" system, ngenxa yoko kunokwenzeka ukuba ukwahlula ubunzima beli gciwane:
- Ukungafezeki kwe-Uteroplacental 1a ibonakaliswe yimingcipheko kwi-metabolism yezinto ezisetyenzisweni lwe-placenta, apho ulwalamano olusezantsi lwentlanzi aluhluphekanga.
- Ukungafezeki kwamaplaza 1b degree. Nantsi yonke into ihambelana ncamnye, yile: indlela yokujikeleza kwegazi ye "fetus-placenta" ifanelekile kwiimeko ezingasebenzi, kwaye ukuhamba kwegazi okuphambene negazi kuphulwa.