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Obstetric ultrasonography, or prenatal ultrasound, is the use of medical ultrasonography in pregnancy, in which sound waves are used to create real-time visual images of the developing embryo or fetus in the uterus (womb).
Head hair becomes coarse and thicker. Birth is imminent and occurs around the 38th week after fertilization. The fetus is considered full-term between weeks 37 and 40 when it is sufficiently developed for life outside the uterus. [ 14][ 15] It may be 48 to 53 cm (19 to 21 in) in length when born.
Studies of the Fetus in the Womb. Studies of the Fetus in the Womb are two coloured annotated sketches by Leonardo da Vinci made in around 1511. [ 1] The studies correctly depict the human fetus in its proper position inside a dissected uterus. [ 2] Leonardo depicted the uterus with one chamber, in contrast to theories that the uterus had ...
Nashville, Tennessee, U.S. Hand of Hope is a 1999 medical photograph taken by Michael Clancy during open fetal surgery, showing the hand of the fetus extending from the incision in the mother's uterus and seeming to grasp a surgeon's finger. Clancy was documenting a procedure being developed at Vanderbilt University to treat spina bifida.
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 ...
Uterus. The uterus (from Latin uterus, pl.: uteri) or womb ( / wuːm /) is the organ in the reproductive system of most female mammals, including humans, that accommodates the embryonic and fetal development of one or more embryos until birth. [ 1] The uterus is a hormone -responsive sex organ that contains glands in its lining that secrete ...
Fetus in fetu (or foetus in foetu) is a rare developmental abnormality in which a mass of tissue resembling a fetus forms inside the body of its twin. An early example of the phenomenon was described in 1808 by George William Young. [ 1] There are two hypotheses for the origin of a "fetus in fetu". One hypothesis is that the mass begins as a ...
In a two-hour procedure, when the fetus was at 34 weeks and 2 days gestational age, doctors used ultrasound imaging to guide a needle through the uterus of the mother and into a vein in the back ...