Board Thread:General Discussion/@comment-26342283-20150426230124/@comment-25725945-20150713011840

The whole reason why Rose gave up her physical form is because she was full gem, and she was the one giving birth (the gem acted as an umbilical cord while Steven was developing). If Steven wanted to have a child, he would be unaffected because he's male, unable to give birth, and part human. It's pretty obvious, guys.