Depends on individual. For some, the first signs of pregnancy is constipation! Speak to your doctor about this. Get a diet with lots of fruits - papaya, veggie, dragon fruit, kiwi. Be careful with banana and apples (monitor your body's reaction to these) because sometimes, these causes constipation. Eat wholemeal bread instead of the white bread. You should be able to go smoothly everyday. Otherwise, ask your doctor to prescribe lactus - it is very useful in adults, babies, children. it is a stool softener (not laxative). So, it is safe. You need to take care, else, it will get worse, and the worse it gets the harder to become normal after given birth.