the economics of sex

My medical ethics teacher followed this with a discussion about the family unit and the negative factors Modern birth control has caused. He was telling us that the fertility awareness method is statistically beneficial because of increased communication required in a relationship, a rewire of a mans brain increasing oxytocin and decreasing depression, and 2% divorce rates of couples using this method. There was a lot of talk about how birth control has been a driving force for divorce and less happiness overall in society and the increase of infertility could be connected. I want to hear how the women in this group feel about this because I’m not sure how I myself feel