I am planning to invite my parents in visitor visa. My wife is expecting baby like in the end of Feb 2010. We want to invite them so that they can meet the new member of the family plus we can also take them to show some of the beautiful places in the United States. This is what we are planning to mention in our Invitation letter to them.

Lets say, If my parents get Visa, is there some restriction like they have to enter United States before the Baby is delivered. If for some reason they can not visit United States, before baby is delivered, can they still visit after the delivery?

Thanks,
Raju