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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 the United States, the range of weight gain that doctors generally recommend is 25 ...
Measurement of the belly being performed by a pregnant woman during her pregnancy. The amount of healthy weight gain during a pregnancy varies. [102] Weight gain is related to the weight of the baby, the placenta, extra circulatory fluid, larger tissues, and fat and protein stores. [16] Most needed weight gain occurs later in pregnancy. [103]
An ultrasound showing an embryo measured to have a crown-rump length of 1.67 cm and estimated to have a gestational age of 8 weeks and 1 day. Crown-rump length (CRL) is the measurement of the length of human embryos and fetuses from the top of the head (crown) to the bottom of the buttocks (rump).
Quickening indicates the start of fetal movements, usually felt 14–26 weeks after conception, or between the fourth and sixth month. [ 5 ] [ 6 ] A woman pregnant for the first time (i.e., a primigravida woman) typically feels fetal movements at about 20–21 weeks, whereas a woman who has given birth at least once will typically feel ...
Their babies are least likely to either be low-birth weight or high-birth weight. It is advised that women with a normal weight before pregnancy should gain a total of 11.5 kilograms to 16.0 kilograms throughout gestation, which is approximately 0.4 kilogram per week in the second and third trimesters. [3]
Also starting about week 12, the thoracic diaphragm moves up and down as if the fetus were breathing, but this movement disappears about week 16 and does not resume until the third trimester. [ 16 ] Movements such as kicking continue, and the mother usually feels movement for the first time, an event called quickening , during the fifth month ...
Fetal alcohol syndrome usually occurs when a pregnant woman has more than four drinks per day. Milder symptoms have been found with two drinks per day during the early part of pregnancy. [53] [54] Evidence of harm from less than two drinks per day or 10 drinks per week is not clear. [53] [55]
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 weeks), moderate to late preterm (32 to 37 weeks). [20]
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