A woman’s heart while pregnant will need to pump more blood around the body to compensate for the blood being directed to their baby.

There is no scientific evidence that links exercise with a miscarriage. Although certain kinds of exercise will need to be stopped as the pregnancy progresses. For example, marathon running and mountain biking are not exactly suitable for a woman who is 7 months pregnant. A doctor should be consulted on what kinds of exercise are okay and what should be stopped for the duration of the pregnancy.

When fallopian tubes become damaged or blocked, they keep sperm from getting to the egg or block the passage of the fertilized egg into the uterus.

Sexually transmitted infections such as chlamydia and gonorrhea can cause fallopian tube damage.

Most women hit their fertile peak between the ages of 23 and 31, though the rate at which women conceive begins to dip slightly in their late 20s.

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'.