UPPSALA, Sweden — If you’ve ever wondered why your newborn seems hardwired to cry for hours while your friend’s baby settles easily, new research shows the answer might be in their DNA. A large twin ...

A Swedish study, published in JCPP Advances, took questionnaire responses from nearly 1,000 parents of twins, at 2 and 5 months of age. Researches looked at both fraternal and identical twins to ...

How much an infant cries is largely steered by their genetics and there is probably not much that parents can do about it. This has been shown in a new Swedish twin study from Uppsala University and ...