Clinically, for different women, the chances of ectopic pregnancy are different and are influenced by a variety of factors, which are analyzed as follows: First, for women between the ages of 25 and 28 who have never had an ectopic pregnancy before, the chances of ectopic pregnancy are between 2% and 3%, because as women grow older, the degree of development of the uterus becomes more mature and the function of the ovaries and fallopian tubes becomes more perfect, so the chances of ectopic pregnancy are smaller. The probability of ectopic pregnancy is relatively small. Secondly, for women over 28 years old, if they have already had an ectopic pregnancy before, the probability of having another ectopic pregnancy will increase, between 4% and 5%, because as women age, their physiological functions will slowly decline, leading to functional abnormalities as the functions of their organs decline. For example, the ovaries, the uterus and the fallopian tubes, when the function of these organs is abnormal, the probability of ectopic pregnancy increases.