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De bevruchting
• 1 zaadcel dringt binnen en bevrucht de eicel
• Ontstaan van een bevruchtingsmembraan
De bevruchting
• Versmelting van kern eicel en zaadcel
• 23 + 23 chromosomen  totaal 46
• Zygote ontstaat
Delingen
• Zygote gaat delen
• Vervoer van eicel naar baarmoederslijmvlies
(m.b.v.trilhaartjes eileider)
Innesteling
• Eicel zet zich stevig vast in baarmoederslijmvlies
• Slijmvlies wordt dikker
• Slijmprop
3 weken
• 2 mm
• Embryo ligt in vruchtwater  bescherming tegen schokken
• Placenta & Navelstreng ontstaan
(voor uitwisseling stoffen met moeder)
4 weken
• 6 mm
• Begin hersenen / ruggegraat
• Staart
• Hart (zakje onder hoofd)
5 weken
• 10 mm
• Ogen, neus en mond ontwikkelen
• Start ontwikkeling ledematen
6 weken
• 15 mm
• Gezicht steeds duidelijker
• Ontstaan ribben
8 weken
• 4 cm
• Alle organen aanwezig
• Begin vorming zenuwstelsel
• Spieren beginnen te werken
• Embryo heet nu FOETUS!
13 weken (3 maanden)
• 8 cm / 28 gram
• Lichaam produceert zelf bloedlichaampjes
• Spieren sterker  ‘schoppen’
16 weken (4 maanden)
• 15 cm / 125 gram
• Foetus bedekt met laagje donzig haar
• Huidcellen maken huidsmeer (bescherming)
• Geslachtsorganen ontstaan (zien via
echoscopie)
5 maanden
• 23 cm / 380 gram
• Zintuigelijke reacties  bijv reacties op licht, geluid en
bewegingen moeder
• Foetus kan draaien
7 – 9 maanden
• 7 mnd: 38 cm / 1300 gram
• 8 mnd: 40 cm / 2500 gram
• 9 mnd 3000 – 4000 gram
• Foetus ligt steeds vaker met hoofdje naar beneden
Geboorte
1) De ontsluiting
2) De uitdrijving
3) Nageboorte

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De bevruchting

  • 1. De bevruchting • 1 zaadcel dringt binnen en bevrucht de eicel • Ontstaan van een bevruchtingsmembraan
  • 2. De bevruchting • Versmelting van kern eicel en zaadcel • 23 + 23 chromosomen  totaal 46 • Zygote ontstaat
  • 3. Delingen • Zygote gaat delen • Vervoer van eicel naar baarmoederslijmvlies (m.b.v.trilhaartjes eileider)
  • 4. Innesteling • Eicel zet zich stevig vast in baarmoederslijmvlies • Slijmvlies wordt dikker • Slijmprop
  • 5. 3 weken • 2 mm • Embryo ligt in vruchtwater  bescherming tegen schokken • Placenta & Navelstreng ontstaan (voor uitwisseling stoffen met moeder)
  • 6. 4 weken • 6 mm • Begin hersenen / ruggegraat • Staart • Hart (zakje onder hoofd)
  • 7. 5 weken • 10 mm • Ogen, neus en mond ontwikkelen • Start ontwikkeling ledematen
  • 8. 6 weken • 15 mm • Gezicht steeds duidelijker • Ontstaan ribben
  • 9. 8 weken • 4 cm • Alle organen aanwezig • Begin vorming zenuwstelsel • Spieren beginnen te werken • Embryo heet nu FOETUS!
  • 10. 13 weken (3 maanden) • 8 cm / 28 gram • Lichaam produceert zelf bloedlichaampjes • Spieren sterker  ‘schoppen’
  • 11. 16 weken (4 maanden) • 15 cm / 125 gram • Foetus bedekt met laagje donzig haar • Huidcellen maken huidsmeer (bescherming) • Geslachtsorganen ontstaan (zien via echoscopie)
  • 12. 5 maanden • 23 cm / 380 gram • Zintuigelijke reacties  bijv reacties op licht, geluid en bewegingen moeder • Foetus kan draaien
  • 13. 7 – 9 maanden • 7 mnd: 38 cm / 1300 gram • 8 mnd: 40 cm / 2500 gram • 9 mnd 3000 – 4000 gram • Foetus ligt steeds vaker met hoofdje naar beneden
  • 14. Geboorte 1) De ontsluiting 2) De uitdrijving 3) Nageboorte