News Animals

Baby marmosets may practice their first distinctive cries in the womb

Ultrasounds tracking fetal mouth movements pinpoint when vocalization motor skills develop

Marmoset carrying two babies on its back

Baby marmoset monkeys, like the ones shown here, are born knowing how to cry. Ultrasound videos suggest they start practicing the motions in utero.

jantroyka/iStock/Getty Images Plus

By Anna Gibbs

- More than 2 years ago

Cradled inside the hushed world of the womb, fetuses might be preparing to come out howling.