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.

Most adults can eat a meal without needing to focus on breathing at the same time. Synchronized eating and breathing involves a coordinated effort that most people master at a young age. Some infants present different circumstances because they drink from a bottle and are still developing this coordination.

Newborn babies need to be burped after being fed so that they can expel gas created from swallowing milk and air. Sometimes, during night feedings, your baby may drift off to sleep as she is being fed.

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.

Babies are most at risk of contracting viruses and infections during their first year of life, according to the Baby Center network. If your baby drinks from a bottle, it is important to sterilize the bottle to kill bacteria before using it.

Preemies, or infants born prematurely at less than 37 weeks gestation, have a high risk for feeding and growth problems, gastroesophageal reflux and other complications.

Baby door bouncers, or jumpers, consist of a seat attached to stretchy, bungee-like cords that clamp to the top of a doorway. They allow pre-walking babies to burn off extra energy and enjoy some freedom of movement.

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.

"Crying it out" is a practice that began late in the 20th century as a tool for sleep-training older babies. Sleep-training is adjusting an infant's sleep habits to teach him to sleep through the night, on a regular schedule.

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.