Uy, first time mom pa lang kaya totally understandable ang worry mo! Honestly, ang dermoid cyst during pregnancy is quite rare and operational decisions like that really depend on your OB kasi bawat case is different, some doctors prefer to wait until after delivery, some don't if it's urgent. Best talaga na makausap mo directly ang doctor mo about your specific situation at kung may risks with the surgery sa baby, kasi sila lang makakasiguro kung safe or not sa inyo both. Rooting for you!