When pregnant how do you know the baby is growing?

During pregnancy, signs that the baby is growing include regular ultrasounds that measure the baby's size and development, as well as monitoring the heartbeat, which can typically be detected around six weeks. Additionally, the mother may experience physical changes, such as a growing belly and increased fetal movement, particularly between 18 to 25 weeks. Regular prenatal check-ups help ensure the baby's growth is on track through various assessments.