Iviki lama-27 lokukhulelwa kungukuqala kwe- trimester yesithathu yokukhulelwa . Ngalesi sikhathi isisindo se-fetus sifinyelela ku-1 kilogram, ubude - ububanzi buka-34 cm, ububanzi bekhanda - 68 mm, ubukhulu besisu esisodwa - 70 mm, nesifuba - 69 mm. Ngesonto lama-27 lokukhulelwa, ukunyakaza kwe-fetal kubonakala kakhudlwana, njengoba i-fetus isifinyelele kakade usayizi omkhulu ngokwanele, uhlelo lwayo lwamasculoskeletal luyaqhubeka nokuthuthuka ngakho-ke, ukunyakaza kuyasebenza kakhulu.
Izinguquko ze-fetal ngesonto 27
Emasontweni angama-27 ingane isakhiwe ngokuyisisekelo: uhlelo lwe-cardiovascular, uhlelo lwe-urinary (ludlulela umchamo ku-amniotic fluid), uhlelo lwamasculoskeletal, amaphaphu kanye ne-bronchi seluvele lwakhiwe, kodwa lo mshini osebenzayo awukakhiqizwa. Uma ingane enjalo izalwa, uma kwenzeka kwenzeka usizo, amathuba okuphila angaphezu kwama-80%. Isikhundla se-fetus ngesonto lama-27 singashintshwa futhi sihlelwe ngaphambi kokubeletha. Kule minyaka yobuhlungu, ingane encane isuka ngezandla nezinyawo, iyancipha, igubha amniotic fluid kanye nama-hiccups (owesifazane uzwa ukukhathazeka okukhulu ngokulinganayo), uyamunca umunwe. I-fetus emavikini angu-27 isivele isenza ukunyakaza kokuphefumula (ukufika ku-40 ukunyakaza ngomzuzu).
Umsebenzi we-Fetal ngesonto 27
Umsebenzi we-fetal ngesonto 27 uxhomeke ezinkathini eziningi. Ngakho-ke, ukuguqulwa kwe-fetus kwanda ngokucindezeleka komzimba nangokwengqondo komama. Ukwandisa umsebenzi we-fetal kungase kuhlotshaniswe ne-hypoxia (ene-insufficient ye- intanuterine , ukutheleleka kwe-intrauterine ) - ukubonakaliswa kwayo kokuqala, futhi nokuhlukumeza kwayo, ngokuphambene, kunganciphisa kakhulu.
Sibonile ukuthi ngeviki lama-27 lokukhulelwa umntwana usuvele esebenzayo, uyakwazi ukwenza okuningi futhi usukulungele ukuhlala emvelweni. Kule nkathi, i-metabolism nokumelana nokucindezeleka kuphela.