YOUR BABY"S FIVE SENSES
Before you even start to show, your
baby's five senses have begun to develop.
We will tell you how each of your baby's senses develops and grows
throughout pregnancy.
Touch: At about 8
weeks gestation, your baby will begin to develop a sense of touch. Touch develops first in the cheeks. At about 10 weeks, your baby will develop a
sensation to touch in his or her genital area.
Next to develop are the palms, at 11 weeks and the soles of the feet at
12 weeks. The buttocks and abdomen will
be sensitive to touch around 15 weeks.
By 32 weeks, the entire body is sensitive to cold, heat, touch, and
pain.
Hearing: Your baby's ears
will start to form at around 8 weeks. At
around 18 weeks, the bones in the inner ear and the nerve endings in the brain
are formed enough that your baby can begin to hear sounds. The ears will be structurally complete at 24
weeks. By week 25, your baby will be
able to hear voices and will even be able to distinguish between voices by week
27.
Smell: Your baby's nose will develop sometime
between week 11 and 15. For many years,
it was believed that smell did not develop until after birth because of its
dependence on air and breathing.
Scientists have since discovered that amniotic fluid passes through your
baby's oral and nasal cavity, triggering the sense of smell.
Taste: By week 22,
taste buds are forming on your baby's tongue.
By 24 weeks, your baby can often taste the same flavors you taste. Some experts believe taste preference comes
from what you eat during pregnancy, but no matter what, all babies are born
with a sweet tooth.
Sight: Sight will
be the last sense your baby develops. At
about 26 weeks, your baby's eyes will begin to open and blink since the retinas
will be fully developed. At week 18, while
your baby's eyes remain closed, the retinas can detect the small amount of
light that filters through the mother's body when out in the sun or bright
light. By 33 weeks, your baby's pupils
will detect light and dark and constrict or dilate accordingly, to allow your
baby to see dim shapes.
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