99% of ovarian cysts that are smaller than 5 cm. are benign and will resolve without treatment in one cycle. In a normal pregnancy a cyst called the corpus luteum develops on the ovary and produces hormones that are necessary to support the pregnancy. A cystic mass on the ovary can also be a tubal pregnancy, so if you are having symptoms of pregnancy and have a cyst or pelvic pain, see your doctor ASAP. No, ovarian cyst usually do not interfere with getting pregnant, unless you are having irregular periods, in which case you may not be ovulating each month.