Birth control is just a means, not the cause. Feminism has taught women to disvalue motherhood and to seek a career outside the home. Such a mentality sees a large—or indeed any—family as a distraction from the “real” work that women should be doing. Italy, with the rest of the West, needs to rediscover the the true value of women as women, and again value their roles as wives and mothers in the home.
Girls today are taught that they are FAR too important to ever change a diaper. Diapers are poop. Poop is icky. Babies are icky. QED.