> The researchers aren’t sure if new moms undergo a hormonal change that leads to this surge of dopamine or if their reaction is influenced by the experience of smelling their own baby, the researchers say.

> “It is possible that childbirth causes hormonal changes that alter the reward circuit in the caudate nucleus, but it is also possible that experience plays a role,” Frasnelli said in a statement.

https://www.smithsonianmag.com/smart-news/the-smell-of-newbo...