Tony Perkins Asks Barack Obama an Important Question

I saw this commercial on TV last week and was struck by how clear cut and straight forward the hypocrisy of abortion proponents was revealed. Here is a link to the Youtube of the commercial: Tony Perkins Asks Barack Obama: When Does Life Begin?
If Sen. Obama can claim a father's responsibility begins at conception then how can he simultaneously argue that mothers have the choice to kill that child? Is there a nine month delay on maternal responsibility?