Not if the LDS Church has anything to say about it. I can't speak to the fecundity of the modern Nigerian family, but I'd wager the average American Catholic family is smaller than the average American LDS family , and by significant margin. Anecdotally, a former colleague (an LDS member) recently welcomed his 11th child. Apparently, a family with 11 kids was neither extreme nor unusual in his ward.
Hah, yea I was just going with Catholics since they've been burned into the collective conscious as anti-birth control. Seems most of them don't actually listen to the Pope much these days.