One in four mothers experience postnatal depression within three years, study suggests Women should be called for a formal checkup six to eight weeks after birth, according to UK guidelines 3 January 2021 • 7:30pm Postnatal depression can affect women up to three years after giving birth, new research suggests, as scientists say the screening time for symptoms should be extended beyond current guidelines. Credit: Andrew Matthews/PA Wire Postnatal depression can affect women up to three years after giving birth, new research suggests, as scientists say the screening time for symptoms sho...