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An estimated due date is given by Naegele's rule. According to the WHO, a preterm birth is defined as "babies born alive before 37 weeks of pregnancy are completed." [ 20 ] According to this classification, there are three sub-categories of preterm birth, based on gestational age: extremely preterm (fewer than 28 weeks), very preterm (28 to 32 ...
The estimated date of delivery (EDD), also known as expected date of confinement, [1] and estimated due date or simply due date, is a term describing the estimated delivery date for a pregnant woman. [2] Normal pregnancies last between 38 and 42 weeks. [3] Children are delivered on their expected due date about 4% of the time.
The third trimester is defined as starting, between the beginning of week 28 (27 weeks + 0 days of GA) [36] or beginning of week 29 (28 weeks + 0 days of GA). [4] It lasts until childbirth. Timeline of pregnancy, including (from top to bottom): Trimesters, embryo/fetus development, gestational age in weeks and months, viability and maturity stages
Fetal viability. Fetal viability is the ability of a human fetus to survive outside the uterus. Viability depends upon factors such as birth weight, gestational age, and the availability of advanced medical care. In low-income countries, more than 90% of extremely preterm newborns (less than 28 weeks gestational age) die due to a lack of said ...
Prenatal care in the United States is a health care preventive care protocol recommended to women with the goal to provide regular check-ups that allow obstetricians-gynecologists, family medicine physicians, or midwives to detect, treat and prevent potential health problems throughout the course of pregnancy while promoting healthy lifestyles that benefit both mother and child. [1]
Some degree of weight gain is expected during pregnancy. The enlarging uterus, growing fetus, placenta, amniotic fluid, normal increase in body fat, and increase in water retention all contribute weight gain during pregnancy. The amount of weight gain can vary from 5 pounds (2.3 kg) to over 100 pounds (45 kg).
In human pregnancy, prenatal development is also called antenatal development. The development of the human embryo follows fertilization, and continues as fetal development. By the end of the tenth week of gestational age, the embryo has acquired its basic form and is referred to as a fetus. The next period is that of fetal development where ...
However, other sources define a semester as only containing two periods (fall and spring) of 15 weeks each and a trimester as containing three periods (fall, spring, summer) of 12 to 14 weeks each, and quarters of 10 weeks, [47] or semesters as being 15 to 17 weeks, trimesters 10 to 12 weeks, and quarters 10 weeks each.
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