will a graco carseat fit ina peg prego stroller or a baby trend stroller?

Question by Kendra T: will a graco carseat fit ina peg prego stroller or a baby trend stroller?
my friend is having triplets yes triplets.
two girls & one boy
well they bought graco items but the only triplet strollers we are finding are peg prego & baby trend
we need to know if these are compatible.?
thanks :]
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