Thank you for your query. When a woman finds out she s pregnant, the gestational age is already 4 weeks (calculated from the first date of the last menstrual period). When a miscarriage occurs, all the products of conception are expelled out along with the endometrial lining. It is like a heavy period. However, sometimes, the placental tissue remains adhered to the uterus and needs to be removed either by medications that enhance uterine contractions and if that too doesn t work, it has to be removed manually by a dilatation & curettage (D&C). An ultrasound is performed to confirm that all the embryonic tissue is expelled. Symptoms of pregnancy - nausea, vomiting, frequent urination to name a few. In your aunt s case, she may have meant 3 months. Hope this answers your query. Please get back to us for further clarification. Wish you good health