Police have appealed for help to trace a pregnant teenager who has not been seen since leaving hospital.

Alisha Khan, 19, who is 36 weeks' pregnant, was taken to Royal Manchester Children's Hospital after she fainted while out shopping. She went on to leave the hospital without treatment and was last seen at about 12.20am on Saturday.

Ms Khan, from Oldham, is described as mixed race, slimly-built and has brown eyes.

She usually has long, dark hair but is believed to currently have blonde hair tied back in a ponytail.

She was last seen wearing all black clothing, but is known to have a grey jacket and blue jeans with her. She is known to frequent the Dukinfield, Wythenshawe and Oldham areas.

Detective Sergeant Simon Halliwell of Greater Manchester Police said: "She left the hospital without treatment or checks and we are concerned she may have an ongoing condition that could harm her or the baby.

"We'd like Alisha to contact us to let us know she is OK."

Anyone with information about her should call police on 101.