Babies start developing their 300 bones during the second trimester, according to MayoClinic.com. As your baby grows in utero, her bones turn from cartilage to bone, then fuse together to form an adultlike skeleton. Keeping your baby healthy and promoting good bone health will help ensure a strong skeleton for life.

Swaddlers and Baby Dry are both varieties of diapers sold by Pampers, which is owned by Procter & Gamble. Both types are quite absorbent and will keep your infant dry and comfortable. Young infants, however, are more prone to diaper leaks than older babies.

Your baby will triple her birth weight by her first birthday, according to Glade Curtis and Judith Schuler in "Your Baby's First Year." By the time she reaches six months, her weight gain will start to slow down and weight gain will become more irregular due to growth spurts.

Playpens and play yards are convenient enclosed places for parents to place a baby while taking care of household tasks, but experts warn that you should only put your baby to sleep in a playpen while you are nearby and after you have taken precautions to ensure your baby’s safety in order to help prevent injuries or p

Few situations are as stressful for new parents as caring for a new baby who will not settle and fall asleep. Although most new parents expect to get less sleep than they did before their baby’s arrival, a baby who stays up all night long can try the patience of even the calmest and most dedicated parents.

How early you can tell the gender of your baby depends on the method of detection you use. You might want to know your baby's gender so that you can choose an appropriate name, or you might need to know if your baby is at increased risk for gender-linked genetic abnormalities.

Your baby eats, sleeps and yes, poops. When your baby has a bowel movement, it is hard to determine ahead of time if his clothes will be affected by a leaky diaper. Since babies stool is normally thin, leakage onto his clothes is a common occurrence.

While it might seem like your newborn wakes more often than not, by the time that she reaches 3 months of age, she should sleep for a total of 15 hours each day, according to the BabyCenter website.

New parents are often surprised by the number of vaccines that pediatricians recommend during a baby’s first year of life. Most infants will receive multiple injections at each routine visit to the doctor. You might feel overwhelmed keeping track of which vaccinations your baby is receiving.

Taking your baby’s rectal temperature can seem a little daunting at first if you are a new parent, but the rectal method provides the most reliable and accurate results for very young children, according to the Babycenter website. Taking your child’s temperature can be accomplished quickly using a digital thermometer.

Breast milk provides the best nutrition for your baby during the first year of life. But when breast feeding is not feasible, infant formula is the best alternative. Although formula does not provide immunity benefits from the mother's antibodies as breast milk does, it still provides all the nutrition your baby needs.

When a baby is born, its skull is not the solid single piece of bone it will become later in life. To allow the baby to pass through the birth canal, as well as to allow for additional brain growth, the skull is initially separated into several different parts.