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Pregnancy Trimesters

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Pregnancy Trimesters

A typical pregnancy lasts 40 weeks, starting from the first day of the last menstrual period (LMP) to the birth of the baby. It is divided into three stages, called trimesters: The first trimester, the second trimester, and the third trimester, each of these trimesters are marked by specific fetal developments.

A pregnancy is considered full-term at 40 weeks; infants delivered before the end of week 37 are usually considered premature.


First Trimester (0 to 13 Weeks)

The first trimester is the most essential for a baby’s development. During this time, which is the start of pregnancy, the hormone levels change significantly. Most miscarriages and birth defects also occur during this period. After successful implantation of the fetus in the womb, the womb which is referred to as the uterus begins to support the growth of the placenta and the fetus.The body adds to its blood supply to carry oxygen and nutrients to the developing baby, and the heart rate increases.
One may not look pregnant during the first trimester but the body is going through many changes as it accommodates a growing baby. These changes cause a lot of symptoms like nausea, fatigue, breast tenderness, and frequent urination.

The growing baby develops all of its organs by the end of the third month, thus, this is the most significant time. At this time, it is important to maintain a healthy diet, including adding an adequate amount of vitamins in order to prevent neural tube defects. Smoking and alcohol consumption should strictly be avoided. These habits and any drug usage might result in serious pregnancy complications and birth abnormalities.

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