Ultrasound at 18 weeks gestation
Itís baby! Discover babyís development at 18 weeks and listen in on babyís heartbeat. During this stage of the second trimester, babyís hearing is developed and he may be able to hear your heart beating or your stomach growling.
A baby's heart will begin to beat as early as 5 weeks of embryonic development. By 10 weeks, the heart is almost completely developed and will resemble that of a newborn baby. At birth, the baby's breathing will trigger changes in the heart and arteries, and will force blood to travel through the lungs.