Is it safe? · by category

Fetal development

2 cited answers about fetal development, each with its verdict and sources.

2 entries

Safe
When Can Your Baby Hear You in the Womb?
A fetus begins responding to sound around 19 to 24 weeks, first at lower frequencies, and auditory responses become broader.
Evidence summary
When does baby's heartbeat show up on ultrasound?
Embryonic cardiac activity is often visible on transvaginal ultrasound around 6 to 7 weeks of gestational age, while exact timing varies with dating.