Passage of tissue and blood clots
during a menstrual cycle can happen when the endometrial casts are shed or due to a chemical pregnancy
. Passage not related to cycles should be considered to be either an abnormal cycle or a miscarriage
. It is difficult to speculate without having observed at the time. The ovum can pass through severed tubes when the healing tissue can cause adherence and if the severed parts are close enough. This can be tested by a tubal patency test and a sonogram.Hope your query has been clarified. Wish you good health.