That’s a very good question. And to broaden it, would it have only worked with the pill but not an IUD, and what about if Joseph (or was it god) had been wearing a condom? Obviously an area that needs intense philosophical study.
Welcome. That’s a loaded question, with many different philosophical views, depending on who answers that question. I can imagine what Xians would say, as well as various atheists POVs too. If you take the story solely as literature, it could go anyway the author wanted it to go. Maybe she missed a dose or two.
And to broaden it, would it have only worked with the pill but not an IUD, and what about if Joseph (or was it god) had been wearing a condom? Obviously an area that needs intense philosophical study. 
