In the general population, the major risk factors for<unk>  are the same as those for ectopic pregnancy: * Previous history of ectopic pregnancy * Tubal surgery * Pelvic inflammatory disease * Use of an intrauterine device * In utero diethylstilbestrol exposure * Smoking Women participating in an assisted reproductive program have an increased risk of<unk>  for several reasons including: * Higher incidence of ovulation due to treatment * Multiple embryo transfers * Technical factors in embryo transfer which may increase the risk for ectopic and<unk>  * Higher incidence of tubal malformation and/or tubal damage in this group * Higher levels of estradiol and progesterone due to hormonal treatment
Heterotopic pregnancy
Cryptic pregnancy
Abdominal pregnancy
Molar pregnancy
Mixed Müllerian tumor
Interstitial pregnancy
Malignant triton tumor
Ectopic pregnancy