In vitro fertilization: How high is the success rate at age 30? In vitro fertilization has become a lifeline for infertile couples. However, for many women in their 30s, what is the success rate during IVF? Below we will discuss this issue from four aspects. 1. The influence of age on the success rate. The age of a woman is a key factor affecting the success rate of IVF. According to statistics, among women under 30 years old, the success rate of IVF is about 50% on average. Between the ages of 30 and 35, the success rate begins to decline, averaging around 40%. As age increases,