This edition of Null and Noteworthy highlights results that reveal the difficulty in drawing definitive conclusions from data, including new findings about epidurals that contradict several others and an apparent null result on sex differences that may derive from “circular logic.”

A new resource gives an unparalleled look at how fetal placental cells attach to the uterine wall and remodel maternal blood vessels to access nutrients.

Children with congenital heart disease have an increased likelihood of autism. Why?

This month’s issue of the Null and Noteworthy newsletter breaks down some negative results involving prenatal exposures, an experimental treatment for Angelman syndrome, and the role that age at autism diagnosis plays in subsequent outcomes, and more.

As acetaminophen lawsuits make their way through the U.S. court system, researchers reevaluate the quality of the evidence linking in-utero exposure to the painkiller to neurodevelopmental issues in children.

More than 100 parents who used the drug during pregnancy claim it caused their child’s autism or attention-deficit/hyperactivity disorder, although the science behind the allegations is murky.

Researchers and clinicians were quick to point out the flaws in the study, and a flood of work refuted it.

Male rats prenatally exposed to a maternal immune response have atypical responses to other rats in distress, according to a new study.

This month’s newsletter highlights findings on the use of three medication types during pregnancy.

Having an infection during pregnancy is tied to a small increase in the chances of having an autistic child, but the connection may not be causal.