Hello and thanks for the question. I have re-read Numbers 5 and can't find any reference to a God-induced abortion. The text tells us the guilty woman's stomach would swell as part of a curse (5:27) but that is a far cry from her actually being pregnant. In fact, the text goes on to say that if she is innocent of the charges brought against her, then she shall be able to conceive (5:28). In any case, I have laid out several lines of argument in defense of the pre-born. I am wondering where you stand on the matter. God bless