Social media survey
The social media survey was a cross-sectional online survey carried out in the UK and included a self-selecting sample of women recruited by advertising on social media platforms: Facebook, Instagram, Twitter and Pinterest. There was no sampling frame; the survey was open to all women aged 16 years or older, who had given birth in the UK between March and August 2020, an estimated 340,780 women (292,598 in England), and who were living in the UK at the time of the survey [