One in five women with a child under 2 have ever been diagnosed with depression, according to the most recent national Australian study (conducted in 2010). Although the majority of women were diagnosed prior to their pregnancy, 3.7% were diagnosed while they were pregnant, 18.8% in the first year after the child’s birth, and 4.1% after the child’s first birthday. Data from all births in Sydney (including over 17,000 women) found that development of post-natal depression [PND