During my ultrasound test, i have an early intrauterine pregnancy for 5 weeks and 1 day by MSD. They found out anechoic cyst measuring 3.0 x 2.8 x 2.9 cm can probably a corpus luteum cyst at my right ovary. I just want to know what is the difference and meaning of anechoic cyst and corpus luteum cyst. Is it a cancer nor dangerous to my health and for my first baby to be? Can you give me an advice for what to do. Thanks.