In Pictures: The pregnant duchess

The Duchess of Cambridge is in labour and has been admitted to the private Lindo Wing at St Mary's Hospital in west London.

Prince William and Catherine's second baby will become fourth in line to the throne, behind older brother Prince George, who was born in July 2013.

Photographs during the duchess's official engagements over the past few months have captured the course of her pregnancy, as seen in the images below.

Image copyright Reuters
Image caption The Duchess, seen here at the Stephen Lawrence Centre in south-east London in March, does not know the gender of her unborn child.
Image copyright Reuters
Image caption The duchess and her husband attended a St Patrick's Day Parade at Mons Barracks in Aldershot.
Image copyright AP
Image caption Artist Trish Morrissey met the the pregnant duchess when Catherine visited the Turner Contemporary in Margate, Kent.
Image copyright AP
Image caption Employees at Ealing Studios met the pregnant duchess when she arrived to visit the set of TV series Downton Abbey, in west London.
Image copyright PA
Image caption The Duke and Duchess of Cambridge were presented with a baby grow for their second child during their visit to urban youth charity XLP in Gypsy Hill, south London.
Image copyright AP/PA
Image caption Like Prince George the baby will be born at the private Lindo Wing facility, based within an NHS hospital.
Image copyright AFP
Image caption Prince George, seen here with his parents in 2014 during a visit to a Sydney zoo, will soon have a playmate to share toys with.

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