if someone has a retarded sibling most likely theyre retarded too

[Despicablecel]

Water thread but yea

 

[Trident]

there could be some birth complications, or mother was smoking, drinking, gave birth later in 30s/40s.

 

[Despicablecel]

siblings can very well vary in intelligejce though but rarely by a lot

 

[Despicablecel]

there could be some birth complications, or mother was smoking, drinking, gave birth later in 30s/40s.

maternal age doesnt really do much unless very late (mid 40s+) and the mother usually does the same thing every pregnancy bar outliers

 

[ItsovERfucks]

there could be some birth complications, or mother was smoking, drinking, gave birth later in 30s/40s.

True