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epidermiologie fertilité


petitepharmacienne
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Imagine que tu prennes un hôpital : la moyenne des femmes qui accouchent de leur premier enfant est 28.5 ans 

Maintenant si tu prends toutes les femmes qui accouchent (que ce soit le premier, le deuxième ou le quinzième enfant) la moyenne est de 30.4 ans 

 

C'est tout bon ? 🤗

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