The tuition fee is 4,300 Euros per trimester, for a total of 12 trimesters. Cervical weakness may cause miscarriage or preterm birth during the second and third trimesters. GGT levels are higher during 2nd and 3rd trimesters in pregnancy. Human pregnancy can be divided roughly into three trimesters, each approximately three months long. Pregnancy is divided into three trimesters, each lasting for approximately 3 months. In pregnancy conditions GGT activity is reduced in 2nd and 3rd trimesters. These medications may also be used in the second or third trimesters of pregnancy. These stages are also referred to in pregnancy as terms or trimesters. Signs and symptoms in pregnant mothers tend to improve during the second and third trimesters. In pregnant women, the total bilirubin level is low in all three trimesters. Consequently, pregnant women should not use black haw in the first two trimesters. Levels of hemoglobin are lower in the third trimesters. Most academic classes ran for two trimesters. In high schools, the year is divided into three trimesters and classes are usually yearlong. The school year is divided into trimesters (or quarters) that last about three months.