For the convenience of health care providers, pregnancy is typically divided into three periods, or trimesters, each of about three months. These divisions are made on the basis of changes taking place in the body of women during entire pregnancy.
The second trimester usually begins from the 14th week of pregnancy and it extends up to the 27th week .This trimester is often called as "golden trimester" of pregnancy. During this period, many of the symptoms of first trimester like morning sickness, nausea, and fatigue may usually disappear. Most pregnant women feel more energized in this period and begin to put on weight as the fetus develops rapidly during this trimester. In the 20th week, the uterus, the hollow muscular organ in the pelvic cavity of pregnant women that holds the fetus, can expand up to 20 times its normal size. It is during this period that women first experience movements of the baby, which is also called as "quickening". This typically happens in the fourth month of pregnancy. By the end of second trimester, the unborn baby will be about 12 to 17 inches long and weigh about 3 to 4 pounds. In addition, your baby's lungs, liver and immune system are continuing to mature. If the baby is born at this stage, then the chances of survival are 85 percent provided there are no serious complications and the baby is immediately put into the neonatal intensive care unit.
Although there is a low risk of spontaneous abortion due to miscarriage during second trimester, pregnant women sometimes have other problems like high blood pressure, urinary tract infection, sugar in the urine, or iron deficiency (anemia).
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