- The document defines pregnancy and divides it into three trimesters. It discusses the common signs and symptoms experienced in each trimester, including amenorrhea, morning sickness, breast changes, fetal movement, and fundal height. Objective assessments include monitoring the size, shape, and position of the uterus as well as listening for the fetal heart tone. Pregnancy can be confirmed through immunological tests that detect human chorionic gonadotropin in urine or blood.