I Have Did Usg Which My Doctor Told Me While

i have did usg which my doctor told me while my checkup in pregnant. after report came doctor told me you baby is 3 months old and according to usg report we find a tumor which is about 3 inches, then doctor told me to do some test like serum ca -125 and cea. now i am suspicious that does my baby get harm due to this ?? and i do not understand how it happens and is this any sedrious problem as doctor said i will talk to ur family regarding this he does not give any explaination to it..