Mums have come together with a campaign to help prevent East Yorkshire's only natural birth centre, Jubilee Birth Centre at Castle Hill to remain open.
The future of the unit looks uncertain - staff shortages and lack of funding have been blamed.
Nearly 900 names have been added to the online petition, there are also groups on social media site Facebook.
To sign the petition visit: http://www.petitionbuzz.com/petitions/keepjubileeopen