The body of Nadia Khan, 24, was found in a house in Holker Street, Bradford on Sunday. She was pregnant and had suffered fatal stab wounds.
Detectives said they could not confirm how many weeks pregnant Mrs Khan was at the time of her death.
Her husband Tariq Khan, 26, from Bradford, has been charged with murder and child destruction.
He has been remanded in custody and is due to appear at Bradford Magistrates' Court on Wednesday.
A man has been charged with murdering his pregnant wife and killing her unborn baby.