Man leaps from third-storey window in Sydney after being stabbed in the neck

A man has jumped from a third-floor window in Sydney after allegedly being stabbed in the neck by a woman following a heated argument.

Police say the 21-year-old woman stabbed the 26-year-old man in the early hours of Saturday in Woolloomooloo.

"The man attempted to escape and jumped from a third-floor window, hitting a parked car below, before running from the scene," police said in a statement.

The man approached police officers on Darlinghurst Road and was taken to St Vincent's Hospital in a serious condition.

The woman was charged with wounding with intent to inflict grievous bodily harm and will appear at Parramatta Local Court on Sunday.