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Minor - ontwikkeling -9 maanden-bevalling

conceptie benodigheden

- 46 chromosomen
- zaadcel xy en eicel xx

- geslachtscellen

- hormonen (testosteron, LH, FSH, porgesteron en oestrogeen

Gele lichaam

Omhulsel eicel, geen bevruchting verdwijnt het en oestrogeen daalt --> mestruatie

Bevruchting vindt plaats in

eileider (bovenin)

Overleving zaadcel en eicel

4-6 dagen en 4 dagen voor ovulatie en 2 dagen na

eerste 2-3 weken

- heel veel verdelingen
- morula (dag 3) --> klontje met cellen

- Blastocyste (dag 5) --> hol balletje

- week 1 a 2 innesteling compleet

volgorde baby

Zygote (0-2 weken) --> embruo --> foetus (na 11 weken)

HCG-hormoon

-Houdt zwangerschap en gele lichaam in stand
- zorgt dat je niet ongesteld wordt (na 3 maanden neemt placenta het over)

- Stimuleert productie progesteron

week 4/5

- lengte 4-6 mm
- aanlegging navelstreng

- onstaan c vorm

- embryonale hart

week 8/9

- lengte 27-31 mm
- foetale fase

- teratogene prikkels

eerste trimester

- 1-12 weken
- organogenese (belangrijkste organen gevormd)

- 6 weken --> hartslag echo

tweede trimester

- 13-26 weken
- rijping, groeien

- leven voelen

- geslacht vaststellen (11 weken ontwikkeld, 14 weken echo)

derde trimester

-groei
- alles is ontwikkeld

- klaar maken voor bevalling

- borsten worden groter

- druk blaas

A terme baby

op tijd (37-42 weken)

Prematuur

te vroeg voor 37 weken

Dysmatuur

te laag lichaamsgewicht voor de duur zwangerschap

serotien

geboorte na 41-42 weken

bevalling

- oestrogeen + oxytocine + prostaglandines (placenta) = uterus (baarmoeder)
- harde buik

- oefen weeen

- 36 weken indaling

ontsluitingsfase

- baringskanaal geschikt gemaakt
- weeen

- verstrijken (baarmoeder mond)

- breken vliezen

uitdrijving en spildraai

- persdrag en volledige ontsluiting
- schedelstraat

- spildraai

- draaien voor hoofd en schouders

- verschillende liggingen

- na uirdrijving langer dan uur ingrijpen

nageboorte

- placenta eruit
- 20 min

- bloeding maar niet erg

- fluxes --> bloeding blijft

- Oxytocine --> zorgt voor spieren samentrekken, gebruikt als de nageboorte sneller moet

na de geboorte

- huilen door klap longen
- knippen navelstreng

- krampjes door darmen die op gang komen

- lever en nieren op gang

- 3 maanden ziet de baby goed en na 4 weken kleur

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