For many parents, seeing an infant’s eyes rolling for the first time can be a worrisome experience, capable of raising both eyebrows and blood pressure. Eye rolling in infants may be normal, but it could also be a sign of a potentially serious health condition.

Yawning is a reflex that is natural in infants and persists into adulthood. The University of Maryland Medical Center describes yawning as an involuntary opening of the mouth usually accompanied by breathing in a large breath. If your infant is tired, drowsy or fatigued, it is normal to see him yawn.

When your infant's skin feels hot to the touch, something is wrong. Unlike older children, you can't ask a baby to hold a thermometer under his tongue for 20 seconds and then describe in words he feels. You can still take his temperature, access his symptoms and provide proper care.

A baby sonogram, also known as an ultrasound, is a common procedure during a pregnancy. Sonograms emit high frequency sound waves from a transducer placed on the mother’s abdomen. The fetus is scanned by rays of repetitive ultrasound beams that reflect back to the transducer and onto a monitor screen.

Infant stool can be a good indicator of your baby's health, according to pediatrician Jay Gordon. The color and consistency of your child's bowel movements are sometimes the best insight you have into how your baby is feeling. Stringy, watery mucus in your infant's stool can have a variety of causes.

Often called obligate or preferential nasal breathers, infants show a propensity for breathing through their noses. Although typically infrequent, mouth breathing plays a key role in helping keep your infant alive and healthy.

Infant boys and girls can both develop swollen tissue that resembles miniature breasts. You may be a bit disconcerted to see that your baby has what looks to be developing breasts, but breast buds in infants shouldn't be an immediate cause for concern.

You are feeding your baby when all of a sudden, a large mucus bubble emits, staining your shirt or burp towel. Mucus spit-up in infants is a common condition that is rarely a cause for concern, but can serve as a messy inconvenience.

New babies are full of surprises, and for many parents of newborn boys, infant erections are one of the biggest surprises of all. If you notice a baby's erection during his bath or when changing his diaper, it's normal to feel a little concerned. But in most cases, your baby's erections are not a cause for worry.

Babies, like older children, grow at different rates. In addition to determining eye color and hair type, heredity plays a large part in determining how tall your baby will grow. But even if heredity suggests your baby won't be an NBA center, there are things you can do to help him reach his height potential.

Baby toenails are very delicate and can be vulnerable to several minor but painful problems. To prevent baby toenail problems such as ingrown nails, nail fungus and brittle nails, you should keep your baby’s feet clean and dry and trim her toenails regularly.

Babies are normally unbalanced on their feet when learning to walk. However, if your baby seems to never gain balance, it could be caused by health factors. Consult your pediatrician if you feel that your baby is having excessive balancing problems for long periods of time when trying to walk.