Ubude obuphakathi bokukhulelwa yizinsuku ezingama-280. Kulezi zinsuku esibelethweni sowesifazane kukhona isimangaliso sangempela - ukuthuthukiswa kombungu wesintu.
Izindlela zokuthuthukiswa kombungu
1-4 amasonto. Inqubo yentuthuko ye-embryo iqala ngokushesha emva kokukhulelwa kweqanda - kweso leso sikhathi kuqala ukuhlukana okusebenzayo kwamaseli. Kakade kule nkathi, umntwana ozayo uzofakwa zonke izitho ezibalulekile, futhi ekupheleni kwesonto lesine kuwo liqala ukujikeleza igazi. Ubukhulu bombungu abukho ngaphezu kokusanhlamvu kwesihlabathi.
Amaviki angu-5-8. I-embryo emavikini angu-5 kakade ayidli iqanda lesisu, kepha lisuka emzimbeni womama, ngoba linomtholo womzimba othuthukile futhi lafakwa emdongeni wesibeletho. Ngalesi sigaba, izinyathelo eziyinhloko zokuthuthukiswa kombungu zenzeka, izakhiwo zangaphandle ezibaluleke kakhulu zakha ngokuzikhandla - ikhanda, izingalo nemilenze, izisekelo zamehlo, ama-rudiments ekhaleni, kanye nefomu lomlomo. Ingane iqala ukuhamba.
Amaviki angu-9-12. Ngalesi sikhathi, ukuthuthukiswa kwe-embryonic ye-embryo kuphela. Ngaphezu kwalokho, umbungu uzoba negama eliyisithiyo "fetus". I-embryo yomuntu isivele isakhiwe ngokugcwele ngamasonto angu-12, zonke izinhlelo zayo zilungele ngokuphelele futhi zizoqhubeka zikhula kuphela.
Amaviki angu-13-24. Ukubunjwa kwe-embryo ngesikhathi se-trimester yesibili kuhlanganisa izinguquko ezinjalo: i-cartilage ye-skeleton iphenduka amathambo, izinwele zivela esikhumbeni sekhanda nesobuso, izindlebe zithatha indawo yazo efanele, izipikili zakhiwa, ama-grooves ezintendeni nasezintendeni (isisekelo sezingcaphuno ezizayo). Ingane ithola imisindo ngeviki le-18, ngeviki le-19 ukwakhiwa kwamafutha angaphansi kokuqala kuqala. I-embryo inezitho zangasese kumaviki angu-20. Ngesonto lama-24, ukuqhutshwa komntwana ongakazalwa kuqalisiwe - umshini osebenza ngokushisa oqala ukukhiqizwa emaphashini, ongavumeli amasaka e-capillary avalwe ngesikhathi sokuphefumula.
Amaviki angu-25-36. Ngolimi lomntwana, kuhlanganiswa amaqabunga, zonke izitho ziyaqhubeka zikhula, ubuchopho bukhula ngokushesha futhi bukhula. Ngokokuqala ngqa evikini lama-28, umntwana uvula amehlo akhe. Ukuthuthukiswa okunamandla kwamafutha angaphansi, okuyinto ngesonto lama-36 ingu-8% we-mass mass.
Amaviki angu 37-40. Ingane ithatha isikhundla lapho izozalwa khona. Kusukela manje, ulungele ukuphila endaweni yangaphandle.
Ubukhulu bombungu ngesonto:
- Amasonto angu-12 - ukukhula kwengane cishe ngo-61 mm, isisindo sayo - 14 g;
- Amaviki angu-16 - 12 cm, 130 g;
- Amaviki angu-20 - 16 cm, 320 g;
- Amaviki angu-24 - 21 cm, 630 g;
- Amaviki angu-28 - 35 cm, 1 kg;
- Amaviki angu-32 - 40-41 cm, 1600 g;
- Amaviki angu 37-40 - 45 cm, 2500 g;
Ingane yesikhathi esigcwele izalwa ngokwesilinganiso ngokukhuphuka kwe-51 cm nesisindo - 3400 g.