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If the cyst
is growing fast then you may need to get it operated for and that can be done with Laparoscopic surgery
but if the cyst gets smaller you can wait.Please follow the doctor and get the Ultrasound
scan repeated to find the increase or decrease in size of cyst and then accordingly your doctor will decide the course of treatment.As far as the risk involved there will not be any direct harm to the baby as the cyst is on ovary and not on uterus
so please discuss with your doctor in detail as she will be able to explain you better what course of treatment will be followed.