Usually hindi na pumapayag mga OB - sonologist ng above 25weeks kasi may mga defects na possible na hindi malaman if 32 weeks na saka lang magpapa-CAS. Mashado na po kasi malaki si baby and siksik na sya. But you can ask naman po the other clinics, the percentage of result accuracy po pagganyang week is 80 to 90% nalang.
April YC