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e. Human embryonic development or human embryogenesis is the development and formation of the human embryo. It is characterised by the processes of cell division and cellular differentiation of the embryo that occurs during the early stages of development. In biological terms, the development of the human body entails growth from a one-celled ...
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 medical care; in ...
A human fetus, attached to placenta, at three months gestational age. In humans, the fetal stage starts nine weeks after fertilization. [7] At this time the fetus is typically about 30 millimetres (1 + 1 ⁄ 4 in) in length from crown to rump, and weighs about 8 grams. [7] The head makes up nearly half of the size of the fetus. [8]
Mummies 317a and 317b were the infant daughters of Tutankhamun, a pharaoh of the Eighteenth Dynasty of Egypt. Their mother, who has been tentatively identified through DNA testing as the mummy KV21A, is presumed to be Ankhesenamun, his only known wife. 317a was born prematurely at 5–6 months' gestation, and 317b was born at or near full term.
At 61, she was hospitalized for chest inflammation and died shortly after. The autopsy found an oval mass the size of a man's head embedded in her right fallopian tube, which weighed 8 pounds (3.6 kg) and contained a fully formed baby boy with hair, two incisors and remains of amniotic fluid. The envelope was not fully calcified. [12] Mrs. Ball
Placenta. The placenta ( pl.: placentas or placentae) is a temporary embryonic and later fetal organ that begins developing from the blastocyst shortly after implantation. It plays critical roles in facilitating nutrient, gas and waste exchange between the physically separate maternal and fetal circulations, and is an important endocrine organ ...
Specialty. Obstetrics and gynaecology. A vanishing twin, also known as twin resorption, is a fetus in a multigestation pregnancy that dies in utero and is then partially or completely reabsorbed. [ 1][ 2] In some instances, the dead twin is compressed into a flattened, parchment-like state known as fetus papyraceus. [ 3]
The fetus reaches a length of about 40–48 cm (16–19 in). The fetus weighs about 2.5 to 3 kg (6 lb 10 oz)to 6 lb 12 oz). Lanugo begins to disappear. Body fat increases. Fingernails reach the end of the fingertips. A baby born at 36 weeks has a high chance of survival, but may require medical interventions. Fetus at 38 weeks after fertilization.