Baby Bodies
Babies are born with this many bones, which later fuse together into fewer bones.
What is 300?
At birth, babies can see best at about this distance.
What is 8-12 inches (about face-to-face distance)?
A full-term pregnancy lasts about this many weeks.
What is 40 weeks?
Most babies begin to smile socially around this age.
What is 6-8 weeks?
Newborns don't actually make this when they cry at first.
What are real tears (they come a few weeks later!)?
This is the average number of hours a newborn sleeps per day.
What is 14-17 hours?
This is the first sense babies fully develop in the womb.
What is touch?
This organ grows specifically to support the baby during pregnancy and is discarded after birth.
What is the placenta?
Many babies can roll over from tummy to back by about this age.
What is 4 months?
This reflex is why babies look like they're dramatically "falling" in their sleep.
What is the moro (startle) reflex?
This is the organ that is actually bigger in babies than adults (relative to body size).
What is the liver?
Newborns recognize this sound almost immediately after birth.
What is their mother's voice?
This is the most common birth month in the US.
What is August?
This is the typical age range when babies being to sit unsupported.
What is 6-8 months?
Babies are born with these all over their body--and yes, it's normal.
What is fine body hair (lanugo)?
This is the only part of the baby's body that continues to grown their entire life.
What is their ears?
Babies are born with this many taste buds--more than adults!
What is about 10,000?
This is the medical term for the first bowel movement a baby passes after birth.
What is meconium?
Most babies say their first real word around this age.
What is 12 months?
Babies are born with this body part already full adult size.
What is their eyeball?
Babies are born with kneecaps made mostly of this material instead of bone.
What is cartilage?
This is the last sense to fully mature in infancy.
What is vision (depth perception develops last)?
The average newborn weighs about this much.
What is 7.5 pounds?
This is the developmental term for a baby's strong emotional bond with their caregiver.
What is attachment?
A very common first act of many newborns that usually hits a doctor, nurse, or parent.