Hallow Dear, If you are in a developing or undeveloped country, the conditions of the roads are not good. So I would not advise you car travel. However, if you are in a developed country where the roads are in very good condition, car travel is allowable. I would urge you to prepone travel by two weeks. Pregnancy is most stable in the second trimester; i.e. between 12 weeks to 28 weeks. After 28 weeks, the uterus becomes more irritable to stress and strain and thus there is always a risk of preterm delivery due to travel. So try to travel before 28 weeks. And then travelling at a stretch for 12 hours is going to be quite uncomfortable and strenuous for you at this stage of pregnancy. In the car you are in sitting position throughout the travel. I would advise you to have a break after every 2 hours for about 15-30 minutes when you get down from the car, ease out your legs and back, pass the urine and then restart the travel. I know this will increase the travel time by about an hour or more, still it is better for you and your baby. Otherwise the best travel is air travel; however airlines also accept the passengers under 28 weeks of pregnancy and that too with an Obstetrician s certificate. Hope you will reschedule travel by two weeks earlier. Dr. Nishikant Shrotri