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Samenvatting Zwangerschap

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samenvatting van het thema zwangerschap van het vak moeder en kind

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Uploaded on
March 23, 2023
Number of pages
26
Written in
2022/2023
Type
Summary

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Internationale casuïstiek 2: moeder en kind
Zwangerschap
Inleiding
 Om zwangerschap te begrijpen  aandacht voor menstruele cyclus
 Cyclus van 28 dagen
 Enerzijds hormonaal
- 3 niveaus
o Hypothalamus
 GnRH (Gonadotropine Releasing Hormone)
o Hypofyse
 Oiv GnRH:
 FSH (Follikel Stimulating Hormone)
 LH (Luteïniserend Hormoon)
o Ovaria (eierstokken)
 Oestrogeen
 Inhibine
 Progesteron
 Anderzijds endometrium (=baarmoederslijmvlies

Hypofysaire controle van de ovulatie:




Aan het begin van de menstruele cyclus  lage oestrogeenconcentraties in bloed.




Lage oestrogeenconcentraties in bloed  stimulatie van FSH – productie.

,Stijgende FSH – productie  stimulatie van de groei van follikels.




Door de groei van follikels en oestrogeenproductie  negatieve terugkoppeling naar FSH.

Op welke manier gebeurt de negatieve
terugkoppeling naar FSH?

Follikels groeien  productie van oestrogeen
(oestradiol) stijgt door interactie van granulosa – en
thecacellen in follikel. Eveneens in granulocellen van
follikels productie van inhibine (B)  glycoproteïne
dat afgifte van FSH remt.

, Door negatieve terugkoppeling naar FSH  daling FSH in bloed.




Door daling FSH concentratie in bloed  slechts 1 follikel komt tot rijping (dominante follikel met
meeste FSH – receptoren).

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