Hi, Thanks for posting in HCM. I have read your description and understand your concern. Duphaston contain the active ingredient dydrogesterone, which is a synthetic hormone similar to the naturally occurring progesterone. It is a hormonal preparation commonly used to treat several conditions that are due to lack of progesterone like secondary amenorrhoea, dysmenorrhoea or painful periods, premenstrual syndrome and abnormal uterine bleeding, and is also used to induce conception. Ectopic pregnancy (tubal pregnancy) is a complication of pregnancy in which the embryo attaches outside the uterus. This could occur due to improper movement of fertilized ovum down the Fallopian tube due to various reasons like pelvic inflammatory disease, Fallopian tube anomalies, use of intrauterine devices and endometriosis. Intake of duphaston medication has not been known to be associated with ectopic pregnancy. Hope the information provided would be helpful. All the best.