Patient: Description of condition (onset, main symptoms, hospital visited, etc.): After three years of routine medical checkups and pre-pregnancy, 6 weeks and 12 weeks ultrasound examinations, no fibroids were found. The ultrasound suggested: uterine fibroids combined with intrauterine pregnancy. Why was a fibroid suddenly detected at 24 weeks of gestation without treatment? What is the reason for its occurrence? How should I treat and monitor it? Is there any effect on the baby? Doctor’s reply: The increase of estrogen level during pregnancy may lead to the rapid growth of small fibroids that could not be detected before. If there is myoma degeneration or rapid increase in size within a short period of time, you can continue to observe if there are no symptoms of miscarriage. Usually small fibroids can recover after delivery and larger fibroids can be decided for further treatment at the time of delivery or after delivery. Patient: Thank you very much! That’s a lot of peace of mind.