This is sad:
Although SARS-CoV-2 isn’t often transmitted to the fetus, adverse neurological developmental effects may still occur, the authors noted. Animal experiments have suggested that immune activation during maternal infection may disrupt fetal brain development.
Maternal immune activation seems to be the common pathway to brain immune programming “that can then make offspring more vulnerable to adverse neurodevelopmental outcomes,” said Andrea Edlow, MD, MSc, a maternal-fetal medicine specialist at Massachusetts General Hospital and a senior author of the study.
Edlow and her coauthors previously identified an elevated risk of neurodevelopmental diagnoses in children aged 12 months and 18 months after exposure to SARS-CoV-2 infection during pregnancy. With the new study, the researchers wanted to see whether the association persisted further into childhood, as suggested by smaller observational studies.
“The children are just becoming ages where they will have these diagnoses,” Edlow said. “So we wanted to see does SARS-CoV-2 viral infection in pregnancy behave like other viral infections where it does confer this increased risk of adverse neurodevelopmental outcomes, or is it somehow different?” 
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https://jamanetwork.com/journals/jama/fullarticle/2843606