If you are young, healthy and have a good chance of conceiving after IVF, you are at greatest risk of a multiple pregnancy.
Whilst many people would welcome twins or triplets, multiple pregnancy can present serious health risks to both mother and children, so you might want to consider measures to help prevent it.
Your chances of having a multiple pregnancy can be reduced by having only one embryo transferred to the womb; a process referred to as single embryo transfer (SET).
Up to half of all multiple pregnancies result from fertility treatment and around a quarter of all twins and most triplets are born following IVF treatment.
Compared with single babies, twins are four times more likely to die in pregnancy, seven times more likely to die shortly after birth, and six times more likely to have cerebral palsy.