Abstract: Objective：To investigate the related factors of secondary tubal infertilities after induced abortion. Methods：The case group included 170 tubal infertility patients treated with induced abortions and hysteroscope combined with laparoscope operation from December 2008 to October 2010，and 171 primary infertility patients as control group. The investigators carried out questionnaire survey，including the general conditions，menstrual history，reproductive history，and so on. All the above data were inputted to Access System，proof reading and finished. Results：The proportion of primary sexual life younger than 21 years old and more than 2 sexual partners in the case group are higher than the control group（P＜0.05）；the pelvic inflammation incidence of the case group was more than the control group（χ2=5.62，P=0.02；OR=1.95，95%CI：1.12-3.40）； The patients treated with more than twice induced abortion had higher incidence of thinner endometrium than control group（χ2=4.86，P=0.03；OR=2.37，95%CI：1.06-5.31）. There was no significant difference between the tubal infertility treated with induced abortion and primary infertility at fallopian tube obstruction，hydrosalpinx，tubal infertilities，mesosalpinx cyst and pelvic adhesion by the laparoscope. Conclusions：There is no direct relation between induced abortion and tubal infertility，but induced abortion could cause pelvic inflammation and thinner endometrium，and the sexual history had close relation with induced abortion.

Key words: Abortion, induced, Infertility, female, Fallopian tube obstruction, Pelvic inflammatory disease