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.

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

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

Even in your prime, about half of all eggs have chromosomal abnormalities, and the proportion of eggs with genetic problems increases as you age, explains Dr. David Adamson, president of the American Society for Reproductive Medicine.

The most common overall cause of infertility is the failure to ovulate, which occurs in 40% of women with infertility issues.

These hormones are similar to the hormones naturally produced in women’s ovaries. The progestogen-only pill is sometimes called ‘the ‘mini-pill’ or the POP.