Cov kev pauv hauv lub fetus ntawm lub sijhawm no yog dab tsi?
Tej zaum qhov loj tshwm sim ntawm lub sij hawm no lub sij hawm ntawm gestation yuav hu ua tiav ntawm tsim ntawm xws li ib qho chaw raws li lub placenta. Dua li ntawm qhov tseeb hais tias nws tau tshwm sim ntev dhau los (thaum 5-6 lub lis piam), tsuas yog tam sim no yog tsim ntawm lub voj voog thib peb ntawm cov ntshav ncig, uas ua rau muaj kev sib haum xeeb ntawm placental. Nws yog tom qab hais tias lub neej yav tom ntej niam muaj lub sijhawm (yog tias tsim nyog) los siv cais pawg ntawm cov tshuaj.
Yog tias peb tham txog qhov tshwm sim rau tus menyuam thaum hnub nyoog 19 lub hli cev xeeb tub, ces yuav tsum tau ua raws li cov nram no:
- Cov tawv nqaij npog, raws li ua ntej, tseem zoo wrinkled, thiab lawv cov xim yog liab. Nyob rau tib lub sij hawm, lawv thickening yog sau, thiab daim tawv nqaij them nrog grease los ntawm sab nraum. Nyob rau tib lub sijhawm, subcutaneous rog pib muab tso rau hauv lub puab tsaig, ob lub raum, thiab lub hauv siab ntawm lub fetus. Nws yog nws leej twg, tom qab qhov zoo li tus me nyuam mos liab, yuav ua rau nws ua qhov chaw ntawm lub zog rau thawj ob peb hnub.
- Muaj kev loj hlob sai ntawm lub hauv paus ntawm lub paj hlwb. Yog li, cov kev sib txuas ntawm cov tsev qiv ntawv ntawm lub tuam txhab pib tsim, thiab thaj tsam ntawm lub hlwb nce. Vim tias cov kev hloov no, kev ua haujlwm ntawm kev ua haujlwm ntawm tus me nyuam hauv plab ua rau nws nyuaj dua. Nws pib nquag txav cov leeg thiab ob txhais ceg, muab lawv, nqus nws cov ntiv tes. Tus me nyuam teb zoo rau cov suab nrov nrov, uas pom tau tias thaum ua ultrasound.
- Muaj kev txhim kho ntawm qhov system digestive. Yog li ntawd, nyob rau hauv lub intestine ntawm fetus muaj ib qho txuam ntawm thawj feces, - meconium. Nws muaj exfoliated hlwb ntawm epithelium, bile. Sab nrauv lub meconium tsis tawm, tab sis tag ua tiav thiab ces absorbed rau hauv cov ntshav, nkag mus rau hauv siab, lub hlwb uas disinfect nws.
- Cov kab mob tawm ntawm lub fetus ntawm hnub no yog ua haujlwm zoo. Lub raum ua thiab tso zis rau hauv amniotic kua.
- Cov kab mob hauv lub cev muaj zog. Tshaj tawm cov ntsws bronchioles, cov aggregate uas ua rau cov kab bronchial.
- Kev sib deev plab hnyuv siab raum yog qhov txawv ntawm lub sijhawm no.
Qhov ntev ntawm lub cev ntawm tus me nyuam yav tom ntej rau lub sij hawm no interval ncav 15 cm, thiab nws qhov hnyav yog 250 g.
Ua li cas rau niam txiv yav tom ntej thaum muaj hnub nyoog 18-19?
Hauv qab ntawm lub tsev menyuam, nrog rau kev nce hauv gestation, nce siab dua thiab tam sim no nws tsuas yog 1-2 cm hauv qab ntawm lub puj ntaws. Lub plab yog qhov kev pom zoo, vim li no nws tsis yooj yim zais qhov tseeb ntawm cev xeeb tub los ntawm lwm tus neeg.
Lub neej yav tom ntej niam hnyav nce. Yog li, txij thaum pib ntawm cev xeeb tub, qhov nruab nrab, nws hnyav nyob rau ntawm nyob rau ntawm 3.5-6 kg. Raws li lub plab loj hlob tuaj, kev hloov ntawm lub cev: lub cheeb tsam ntawm cheeb tsam qis qis yog khoov rau yav tom ntej, uas ua rau kev hloov maj mam hloov.
Lub synthesis ntawm melanin nce, uas yuav ua rau cov tsos ntawm pigment me ntsis rau ntawm daim tawv nqaij saum npoo. Tsis tas li ntawd, lub isola ntawm lub txiv mis, qhov kab dawb ntawm lub plab thiab lub qhov tsaus ntuj. Tom qab cov tsos ntawm tus me nyuam txhua yam los rov qab rau qub.
Nws yog tsim nyog sau cia tias thaum lub sij hawm no tus niam lub neej yav tom ntej yuav ntsib ib qho teeb meem, uas nws muaj peev xwm paub qhov txawv:
- qhov tsos ntawm qhov mob nyob tom qab thiab qis rov qab;
- o ntawm taw;
- chim siab ntawm qhov system digestive (heartburn, constipation);
- qhov tsos ntawm qaug dab peg.
Yog tias koj muaj tsawg kawg yog ib qho ntawm cov saum toj no tshwm sim, nws tsim nyog mus ntsib ib tus kws kho mob. Nyob rau hauv tsis muaj cov ntaub ntawv yuav tsum tsis txhob pib rau hauv tus kheej-noj tshuaj.