By two months a baby’s neck muscles should have developed enough for them to support the weight of their own heads for short periods of time.

A nine month old baby is old enough to have formed strong bonds with his or her parents and caregivers and may be wary or frightened of strangers they are unable to recognize.

The extensive use of acetaminophen in pregnancy combined with the paucity of documented adverse effects have served to validate the selection of this medication as the pain reliever of choice during pregnancy.

Studies show that obese men are less fertile than men of normal weight, have lower sperm counts and fewer sperm that can swim well.

Some of the most common side effects of pills are bleeding between periods (most often with progestin-only pills), breast tenderness nausea and vomiting. They usually clear up after two or three months.

There are different types and sizes of IUD and they can work for between 5 and 10 years depending on the type.