Speaking on Daybreak with hosts Lorraine Kelly and Aled Jones, she explained, "There was a kind of baby blues that never went away, and it was only that I was very lucky that my mum had suffered with it that she saw the signs straight away, so my postnatal depression was treated pretty quickly.
"But there's so many women out there who are suffering with it and there's such a stigma attached to it."
Jennifer went on to say that it's hard for women to admit they have depression when they are constantly faced with ideals of how their life should be.
"If you only look at adverts on TV, we're programmed to think that this is the most special time in you life and you're going to have this instant bond and this instant connection," she said. "And for some mums it just doesn't happen, and then they feel that they're a failure."