Hello, I have gone through the query and understood your concern. I will be able to comment better if you can attach the sonogram report on this platform. Usually, hypoechoic areas are observed as a common phenomena, sometimes due to previous procedures, due to calcification, endometritis and fibroids. This need not alter the fertility status unless there are masses beneath the endometrium of the uterus that may hamper implantation of the embryo. I would suggest simple observation and no active interference since instrumentation can cause more harm than benefit. Hope your query has been answered.