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
The speech was OK, passionate at times and certainly well received, but did not display the passion of past speeches.
The brother-in-law of a British hostage being held by Islamic State militants in Syria, says he is scared by US airstrikes in the country.
ITV weather presenter Lucy Verasamy has a look at the weekend weather at Gleneagles where the Ryder Cup is taking place.