The authors of a new study into maternal depression said their findings make a "compelling" case for a rethink in approaches to how to support mothers.
Dr Hannah Woolhouse, psychologist and senior research officer said:
It is likely that current systems of maternal mental health surveillance in Australia and the UK will miss more than half the women experiencing depression in the early years of parenting.
In particular, women who do not have subsequent children may be especially vulnerable to falling through the gaps as they will not be reconnected back into primary care services.
There also needs to be a focus on social health and relationships as we have found a strong link between depressive symptoms and intimate partner violence.
More top news
Former US President George H.W. Bush is in intensive care after suffering from pneumonia, as his wife is admitted as a precaution.
The tech giant is taking steps to measure economic confidence and steps to halt the spread of fake news, but denied that it was a publisher.
Temperatures still a talking point