It is a violation of Federal Law (Title VII of the Civil Rights Act of 1964 and 1991) to ask about pregancy, plans for pregancy or childcare arrangements.

I would be hesitant to accept employment with a company that requires woman (why don't they ask the men too??) about these things. This is not something new in this country and an employer who is not following it is either extremely ignorant of or willfully ignoring this basic of employment law.