Iiveki ezingamashumi amabini anesibini zokukhulelwa zibonakaliswa ngokunciphisa ukukhula komntwana. Ukususela ngeli xesha, ukuphakama kwakhe kuya kulinganiswa ukusuka kwithsaba ukuya kwizithende, ngoxa ngaphambi kokuba kwenziwe kwithsaba ukuya kumsila. Ngoku ubu bunzima malunga no-380 amagremu kwaye ubude buba malunga no-26.7 cm. Imilenze yomntwana iyanweba, kwaye umzimba wakhe uthatha iqondo elifanelekileyo. Ukunyakaza kwama-Fetal kwiiveki ezingama-21 kuba yinto ebonakalayo ngakumbi, kwaye abanokuziva bengabonwanga ngumama kuphela, kodwa kunye nezihlobo.
Ngalesi sikhathi umntwana sele usele ii-eyelashes, iilishi. Unako ukukhenkceza. Ukuba umntwana unesini lesini, iifomtri sele zidlulile, kwaye kwiiveki ezimbalwa ziya kuphuma emlanjeni we-pelvic ukuya kwi-scrotum.
Ukuqala ngeveki yesi-21 yentuthuko yesisu, unokukuva. Ungafunda iincwadi kuye okanye ufake umculo ozolileyo. Ngale ndlela uza kubumba ukukhethwa komculo wengane yakho. Ubusana kwiveki yesi-21 yokukhulelwa luqala ukuvakalelwa ukutya okudliwe ngumama. Oku kwenzeka ngokugwinya i- amniotic fluid . Ngaloo ndlela, ukususela ngoku unako ukwenza iinqununu zengane.
I-norm of fetal anatomy ngeveki 21
Ukuphuhliswa komntwana kwiintsuku ezi-20 ukuya ku-21 kuya kuhlolwa nge-ultrasound. Iiparitha ze-fetus ngeveki 21 zivumela ukuba ahambe ngokukhululekile ngaphakathi koomama kwaye angabonwa ngokupheleleyo. Kule nqanaba lokuphuhliswa kubalulekile ukucacisa iiparameters zesantya senhliziyo yentliziyo, isenzo somqhubi, ubungakanani bomzali, ubude bendawo, isisu esiswini, ubukhulu besifuba, ubukho kunye nophuhliso lwezakhiwo zobuchopho.
I-Fetometry ye-fetus ngeveki 21 kufuneka ngokuqhelekileyo ibe nale ilandelayo
- Ubungakanani bentloko yomzali kweli xesha liphuma kumashumi mane anesithandathu ukuya kuma-50 amithamitha;
- ubungakanani bepilital-occipital bubungakanani ngamashumi amathandathu ukuya kwamashumi asixhenxe anesibini;
- kwinqanaba lekhanda - 166 - 200 mm;
- umjikelezo we-fetus ngu-144 - 187 mm.
Ngeli xesha, i-anatomy ye-fetus izimisele, ubukho bezitho zangaphakathi, isakhiwo sobuso kunye nesifuba. Ngoku ukhangelekile, kwaye umsebenzi wakhe oyintloko kukuhlakulela izihlunu kunye nokuqokelela amafutha. Ukuze wenze oku, umama omele ulindele ukuba adle ngokupheleleyo.