hello doctor, i had two pregnancies with babies suffering from neural problems. first time with anancephally and second time baby with major sulci lag (occipito parital & calcarine fissure lag ) with mild ventrico magaly. we got done fish test,torch test and compleate karyotype but all test results are quite normal and dosent show any prblem. so we are still wondering about reasons for these problems. can you help us on this???