A four-month-old baby should recognize toys, particularly ones that rattle, make fun noises, or are bright in color. They may reach for toys, shake toys, or swing at dangling toys.

A premature birth is a birth that takes place more than three weeks before the baby is due.

Some women feel ovulation as one-sided backache or a tender area. The condition, called mittelschmerz, may last anywhere from a few minutes to a few days.

Eggs that become damaged or develop chromosomal abnormalities cannot sustain a pregnancy.

Emergency contraception prevents pregnancy after sex, which is why it is sometimes called 'the morning after pill', 'the day after pill', or 'morning after contraception'.

After a doctor or other healthcare provider puts in the IUD, it can be used for up to 10 years, depending on the type. After the IUD is taken out, you may get pregnant.