Multiple pregnancies

Abstract

The cultural modifications in women’s reproductive strategies over the past 50 years have drastically influenced the demographic scenario. Higher levels of education and a desire for economic and social success, as well as difficulties in finding a permanent job, have played a major role in modifying the reproductive strategies, as evidenced by delayed parenthood and the reduction in family size [1]. In addition to this expected twinning rate due to advancing maternal age, there is also evidence that natural twinning has increased in women who have been exposed to assisted reproduction technologies [2].