Hi! I went for my first US and they told me that I have a tennis ball sized cyst on one of my ovaries. Baby is great, but the cyst concerns me a little. The doctor said that it could go down in the second trimester on its own when my hormones start to level out and if it doesn't they will just watch it. If it starts to twist or if I have any other complications with it I'll need surgery. Just wondering if anyone else is experiencing the same thing or has with previous pregnancies.