Substrate for a pregnant snake??

[soad]

Hey folks so I was just curious. I use newspaper for most of my snakes but currently my pregnant one is on somethings called yesterday's news. It's a pellet form of newspaper that works quite well. She's a very messy snake and newspaper was getting hard to clean up without moving her around. Is this ok for a snake to give birth on? She is a boa by the way. I would appreciate any tips and suggestions!