Mathoasong a bokhachane, lintlha tse ling tsa ultrasound tse kang ho ba teng ha yolk sac le karolelano ea korona-to-rump li sebelisoa ho thusa ho fumana bophelo bo botle ba bokhachane, lilemo tsa boithati le monyetla oa ho lahleheloa ke bokhachane . Leha ho le joalo, ka mor'a hore ho be le trimester ea pele, lesea le emme le fetohile lesea le lesea le letšoao le lecha le sebelisoa ho fokotsa nako ea ho ba le botšehali le ho hlahloba bophelo bo botle ba lesea.
Har'a lipalo tse sebelisetsoang ho hlahloba khōlo ea fetalane le bophelo bo botle ke bolelele ba femor ea lesea, lesapo le lelelele ka mokotleng oa motho. E lekanngoa ho tloha qetellong ea lesapo ho ea mohareng, hangata botšehali bo lekantsoeng ka limilimithara.
Meeli ea Femur Length e le Letšoao la Bophelo ba Bokhachane
Le hoja nako e khutšoanyane ea ho fumanoa ke femor e ka 'na ea bontša hore ho hlokahala hore ho be le liteko tse eketsehileng ho laola maemo a mang, ke habohlokoa ho hopola mefokolo ea ho sebelisa femour length e le letšoao la boimana bo futsanehileng. Ho tloha phoso ea batho ho ea ho thepa e sesebelitsoeng ea ultrasound ea nako e tloaelehileng ho ea ho fapana ho tloaelehileng, bolelele ba basali ke phetoho e le 'ngoe feela har'a ba bangata e lokelang ho sebelisoa ho etsa qeto ea nakong e tlang ea bokhachane,' me hangata ho na le mefokolo e mengata ea bohlokoa.
Le hoja nako e khutšoanyane ea femour e khetholloang ka ultrasound ka lekhetlo la bobeli kapa la boraro e phahamisa ho ameha ka maemo a mang a hlalositsoeng ka tlase mona, ke habohlokoa ho hopola hore boholo ba bokhachane bona (karolo ea 73 lekholong), batsoali ba tla tsoela pele ho ba le nako e feletseng ho beleha lesea le phetseng hantle leo boholo ba lona bo loketseng lilemo tsa boithati.
Ho nyenyefatsa
Ha botšehali bo fumanoa bo le tlase ho karolo ea bohlano ea palo ea basali, basali ba ka eletsoa ka liphello tse ngata tse ka hlahelang tsa bokhachane. Ntho e 'ngoe e amehang ke hore li-fetus tse nang le nako e khutšoanyane ho feta tse lebeletsoeng li fumanoe li le kotsing e kholo ea masapo a dysplasia.
Ho na le mathata a fetang 200 a ka arohanngoa le masapo a dysplasia, 'me kaofela a khetholloa ke masapo a sa tšoaneng ka lebaka la lefuba le ho hōla ha masapo. Sena se fapane le boemo bo khutšoanyane, e leng bophahamo bo ka bang 3 kapa ho feta maemo a fapaneng ka tlaase ho se boleloang ke lilemo empa e lekane.
Ho se Fumaneha ka Tlhaho
Liphuputso tse ling li hlahisitse ho ameha ka ho lekaneng ha placenta ho fana ka tikoloho e lekaneng ea phepo bakeng sa li-fetus tse nang le nako e khutšoanyane ea bosiu. Ka lebaka la tikoloho eo, nako e khutšoanyane ea bosiu e amahanngoa le liphello tse ling tse bohloko tse amanang le bokhachane tse kang li-fetus tse nyenyane bakeng sa lilemo tsa boithaopi, masea a tsoaloang ka boima ba 'mele le pelehi.
Aneuploidies
Ho phaella moo, nako e khutšoanyane ho feta e lebelletsoeng ke basali e sebelisitsoe e le mekhoa e bonolo ea liphatsa tsa lefutso, tse kang trisomy 21 (Down syndrome), trisomy 13 (Patau syndrome) le trisomy 18 (Edward's syndrome). Lisebelisoa tse bonolo ke "lifolakha tse khubelu" tse fumanoang ho li-ultrasound tse sa tloaelehang, ka bobeli, empa ho e-na le litšobotsi tse hlahelang hangata palo ea masea a nang le litekanyetso li lekile ho khetholla likarolo tsa ultrasound tse sa tloaelehang, empa li etsahala hangata liphatseng tsa fetus ka li-chromosomal trisomies.
Ha li bapisoa le likarolo tse phahameng tse kang mokotla oa letlalo la nuchal, botšehali ba bolelele bo nkoa e le letšoao le tlase la lefu lena.