I know I should take one before the baby gets here, but it kept slipping my mind to sign up for one and now the only ones left are either super-inconvenient or completely not doable. Then I noticed one place that offers the class stipulate that, due to the nature of the material and the need to concentrate, "babies are not allowed in class." So do people tend to take it after they have their baby? I know better safe than sorry, and I would prefer to do it before the baby comes and will do it if it is super-crucial...but is it crucial right away? Advice?