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Epidemiology

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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  • incidence of multiple births has risen in the last 30 years
    • is due mainly to increasing use of assisted reproduction techniques, including in vitro fertilisation (IVF), and also to changing demographics as women defer pregnancy and twins are more common at later ages (102 in every 1,000 women giving birth in 2015 were aged 45 or over

  • twins or triplets occur in approximately 1 in 60 pregnancies (16 in every 1,000 women giving birth in 2015 had a multiple birth), and 3% of live-born babies are from multiple gestations )

  • women with a twin or triplet pregnancy are at higher risk compared with women with a singleton pregnancy
    • adverse outcomes are more likely, both for the woman and her babies, during the prenatal and intrapartum periods
      • because of this, women need increased monitoring and more contact with healthcare professionals during their pregnancy

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