Fertility After 30 - How Age Affects Fertility By: testtubebabyclinic | Apr 25th 2010 - Scientific studies have shown that women who delay first-time pregnancy have decreased fertility after 30. Over the past several decades, we"€™ve seen many advances in birth control and the overall status of women in the workplace. Therefore, it"€™s no surprise that more and more young women are choosing to delay pregnancy until later on in life. In fact, some 20% of women are now giving birth to children after the age of 35. Tags:fertility getting pregnant, fallopian tubes fertility