The lower pole of the chorion has a poor echo area with a diameter of 17x21mm. Ovary (P): There is an empty echo mass, size: 46x48x53, even outer edge, smooth inner edge of the tumor, no septum, no buds, no solid part, no shadow. The doctor said that there was a 10% risk of miscarriage and gave me oral and vaginal medication and I have an appointment for a follow-up visit. October 20, 2020: The result was that around the gestational sac, there was a poor echo mass, accounting for 40% of the circumference of the gestational sac. Ovary: There was an empty echo mass, size: 43x47x52 mm, with little fluid (9:20 am), no fluid in the abdomen. The doctor gave me suppositories and told me to rest. Doctor, is an ultrasound showing a poor echo mass in the lower pole of the chorion and an empty echo mass in the uterine cavity dangerous?