Answer:
Step-by-step explanation:
The fetus's sense of hearing develops during the second trimester of pregnancy. This is a crucial stage when the auditory system starts to form and become functional. Around the 18th week of pregnancy, the structures involved in hearing, such as the ears and the auditory nerve, begin to develop. By the 20th week, the fetus's ears are fully formed and can perceive sounds from the external environment.
During this period, the fetus is exposed to various sounds, both internal and external. Internal sounds include the mother's heartbeat, breathing, and digestive noises. External sounds can include the mother's voice, music, and ambient sounds. Although the fetus's hearing is not as clear and refined as it is after birth, studies suggest that they can recognize certain sounds and rhythms.
The development of the auditory system during the second trimester plays a crucial role in the baby's overall sensory development. It allows the fetus to start experiencing and responding to auditory stimuli, which is an essential part of their early communication and language development.
In summary, the fetus's sense of hearing starts to develop during the second trimester of pregnancy, around the 18th to 20th week. This development allows the fetus to perceive and respond to sounds from both the internal and external environment, contributing to their overall sensory and language development.