In his book he gives tips on how to be a pro actively supportive partner. He says, the enta danger to your baby far outweighs the danger to your relationship. And if you're thinking of e cigarettes, parentheses, and why not? Everything else in our lives seems to have an e or an eye in front of it. There's also one that says, the e cigarette thing and the six foot tall version of your foetus in a street thing.