Hello Madam,My Sister,Sapna,32 yr. old, completed 27 weeks of her first gestation without any complication. she has hypothyroidism since 2 yrs. for which she is taking levothyroxine 100, as prescribed by doctor.she has all routine checkups & investigations which are normal.now she want to travel 12 hr. journey by train at her 32nd week, is it safe for her & baby? or she should travel earlier? please help me to come out.thanking you. Sourabh.