You can do so here...
here. You have to sign up to a google account, then verify the email address you've given. Search for "Vulnerable babies" where it says "put your question to DC, and then vote for that question.
I will be honest, I've had a nightmare signing in, but, that hopefully isn't the norm, and everyone more techy than me should be successful hopefully.
Apols if this has been done already... Its at 6.30pm so quickly ladies please
Just fyi the text of the question is as follows: "While most adults and children in intensive care have a nurse dedicated to them at all times, many vulnerable babies are denied this 1:1 care. There is a shortage of c. 2700 neonatal nurses in England. How would a Conservative government tackle this?"