Assertion: sibling's parent | /r/HasAspect | concern
Facets:
Source sentences:
text: The University of Michigan Health System advises[citation needed] that most occurrences of regressive behavior are mild and to be expected; however, it recommends parents to contact a pediatrician or child psychologist if the older child tries to hurt the baby, if regressive behavior does not improve within 2 or 3 months, or if the parents have other questions or concerns.