Jade Morris and Joe Bebbington began Felicity's Foundation after their daughter was stillborn.
The group has raised more than £20,000 for a neonatal care charity in the last 10 years.
Helen Bennett, 29, thought she only had a bit of a cold but ended up on life support while pregnant.
Investigators hear from families and staff who say care varies based on ethnicity or background.
Shannon Bilson's newborn daughter was treated at home using a "special sleeping bag".
Families will continue to be failed unless the NHS makes meaningful changes, BBC's Michael Buchanan writes.
Caoimhe Archibald said she is deeply concerned that further delays to the bill will delay the introduction of paid neonatal care leave.
Lauren Farrelly had to be taken to Southampton with the dangerous condition while 28 weeks pregnant.
The new scanner at the Royal Cornwall Hospital in Truro has improved access to the Neonatal Unit.
