did they just say cyst? or corpus luteum cyst?

essentially, you need to have a CL cyst to support the pregnancy in the early (first tri) of your pregnancy - it provides progesterone support and stops your body rejecting the fetus until the placenta takes over. given that they don't seem too phased, i'd assume it's a CL cyst

i had one that was measuring larger than yours, and all ok with my pregnancy - i just have a "chunky" ovary from it still...