By six months old a baby’s muscles should have strengthened, and they should have mastered the ability to roll over, even several times at once.

By four months, a baby should have developed the neck strength to hold his or her head unsupported, to stick his or her hands in the mouth, perhaps sucking on fingers, and to watch things move with his or her eyes.

Infants may urinate as often as 1-3 hours or as infrequently as 4-6 hours. Contact your doctor for recommendations on how to make sure your baby is hydrated, and how to monitor for illnesses or infections.

Since your baby's most critical development has taken place by month 3, your chance of miscarriage drops considerably after three months.

If you were at a normal weight before pregnancy, you should gain about 25 to 30 pounds. If you were underweight before pregnancy, you should gain between 28 and 40 pounds. If you were overweight before pregnancy, you should gain between 15 and 25 pounds. If you were obese before pregnancy, you should gain between 11 and 20 pounds.

Though some studies have shown IUD to be effective for as long as 20 years, it is approved only for 10 years of use.