There needs to be better support for new mothers, whether they breastfeed or not, the head of the Royal College of Midwives said.
Cathy Warwick added that "women should not feel guilty about not breastfeeding."
A new study has revealed women who want to breastfeed but are unable to are at most risk of developing postnatal depression.
There may be a link between breastfeeding and a mother's chances of developing postnatal depression, new research has found.
The study, published in the journal Maternal and Child Health, found women who planned to breastfeed, and went on to, were 50% less likely to become depressed than mothers who did not breastfeed.
Women who planned to breastfeed but were unable to were at the highest risk of developing the condition, more than twice as likely to become depressed as mothers who had not planned to breastfeed and didn't.
The survey of the mothers of almost 14,000 babies in the Bristol area during the 1990s found the link was strongest when babies were two months old, but much smaller by the time they were eight months or older.
Around 13% of new mothers experience postpartum depression within 14 weeks of giving birth, posing serious mental health problems for the mother and having a significant effect on the newborn's development, the researchers said.
Julia Langley and her friend Janet Murphy organised the Newcastle protest after reading about Emily Slough being called a 'tramp'. She told ITV News the message they hope to send:
Around 300 women turned out in Rugeley today in support of a woman who was labelled a 'tramp' for breastfeeding her daughter in public.
Similar protests are taking place in Newcastle, Milton Keynes and in Swansea.
Hundreds of people have turned out in support of a mother who was labelled a 'tramp' on Facebook for breastfeeding her daughter in public.
Similar protests are taking place at the same time in other cities and towns across the UK.
Families are due to gather in Swansea today to support a mother who was called a 'tramp' on Facebook for feeding her baby in public.
Emily Slough started a campaign after finding a photograph of herself feeding her daughter had been posted online.
She will be holding a protest in her home town in Staffordshire and other women across the UK will be showing their support.
Hundreds of women are expected to breastfeed at a mass protest in Rugeley in Staffordshire after a picture of a woman breastfeeding her daughter was posted on Facebook.
In it Emily Slough was labelled a 'tramp' for feeding her daughter Matilda.
Under the Equality Act 2010 it is sex discrimination to treat a woman unfavourably because she is breastfeeding.