Pregnancy generally lasts between nine and ten months, or about forty-five weeks, measured from when a woman first becomes pregnant. Health care professionals refer to these three pregnancy groups, collectively known as trimesters, as the trimester of pregnancy.
The first three trimesters of pregnancy are named after they begin and usually include the first of the three critical periods that all women experience: implantation, the beginning of the pregnancy process, and labor. Each of these three periods is characterized by several important events, such as hormone levels, which are regulated by changes in the body’s internal chemistry, along with other factors such as diet, exercise, smoking, and medication. The second trimester, which starts at twenty-nine weeks and ends at thirty-three months, is known as peri-trimester. At this point in pregnancy, hormonal changes are still occurring within the body, although slightly less than during the first trimester. With the second trimester, labor begins, and the baby is expelled from the uterus through the birth canal.
At this point, women’s weight gain and body mass index (BMI) have both stabilized. Most health care providers recommend that women not begin an exercise or other strenuous activity before this point, to preserve their pregnancy. However, even at this stage, the body still needs to be nourished and hydrated, and most health care providers recommend that pregnant women exercise to keep their bodies strong and healthy.
Because each of the three trimesters has a different length, and because the terms “term,” “gestational” pregnant” are often used interchangeably. A woman’s body is considered pregnant only when she experiences four consecutive monthly periods.
Pregnancy occurs in a few different ways, depending on each woman’s age, stage of life, and physical makeup. حوامل During pregnancy, women’s bodies undergo significant hormonal changes, which result in the release of a variety of substances known as prostaglandins, progestins, and estrogen, which help regulate the growth of the growing fetus and maintain its placental development.
Many new mothers find that their experience is not only emotionally fulfilling but physically rewarding as well. While it can be quite physically stressful, pregnancy is an experience that not all women choose to go through. In fact, for many women, pregnancy offers an opportunity to reevaluate their lives and experience life in a new way, and the results can often be life-changing.