Obama explains his Saddleback Forum answer about abortion

In an ABC "This Week" interview with George Stephanopoulos, Obama expresses regret over his answer to Pastor Rick Warren about life's beginning, saying:

It's a pretty tough question. And so, all I meant to communicate was that I don't presume to be able to answer these kinds of theological questions.

Theological? Isn't it more of a straight biological answer? Conception starts the cell division, and that's when life happens.