“…1,2 Other types of heterotopic pregnancies include intrauterine pregnancy in addition to location of a pregnancy in unusual sites such as interstitial portion of the fallopian tube, rudimentary horn associated with a unicornuate uterus, ovary, cervix, pregnancy at the site of a previous caesarean section scar or intra-abdominal. [3][4][5][6][7] Traditionally the incidence of spontaneous heterotopic pregnancy has been quoted as 1 in 30,000 but more recent literature estimates this to be of the order of 2.5/10,000 pregnancies and it can be as high as 1 in 100 with assisted reproduction treatments.…”