At 12 weeks pregnant, most of your baby's systems are fully formed – your fetus' system continues to mature for the next 28 weeks and the organs get to work. Fetal digestive system is beginning to practice contraction movements. The bone marrow is busy making white blood cells — weapons which will one day help your baby fight. Fetal Heartbeat has started beating too
Diet and exercise go hand in hand so keep in mind not to even miss one day of some sort of exercise in order for your pregnancy to be fruitful.