They should use more than just siblings vs. unrelateds. Siblings alone cannot adjust for all genetic confounding. Many genetic errors cause
abortions and preterm birth is just that at a later time. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2613558/ … Must use e.g. MZ-DZ design, see:https://osf.io/8v4xa/
-
-
Twin-designs cannot be used to study effects of gestational age as twins are the result of the same pregnancy (and will have the same GA).
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.