"The womb is such a powerful weapon; it's a weapon against the enemy."

Campbell has 35 grandchildren. She and her husband stopped at six kids, and it is her great regret.

“I think, help! Imagine if we had had more of these children!” Campbell says, adding, “My greatest impact is through my children. The more children I have, the more ability I have to impact the world for God.”

A Christian God, that is. Campbell says if believers don’t starting reproducing in large numbers, biblical Christianity will lose its voice.

“We look across the Islamic world and we see that they are outnumbering us in their family size, and they are in many places and many countries taking over those nations, without a jihad, just by multiplication,” Campbell says.