One does not want to oversimplify, as there are obviously a lot of things going on, to do with changing working patterns, the spread of contraception, the different role of women in society, and longevity.
Nu se doreşte o simplificare prea mare, deoarece, evident, se petrec multe lucruri, legate de schimbarea ritmurilor de lucru, răspândirea contracepţiei, rolul diferit al femeilor în cadrul societăţii şi longevitatea.