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Human embryonic development covers the first eight weeks of development, which have 23 stages, called Carnegie stages. At the beginning of the ninth week, the embryo is termed a fetus (spelled "foetus" in British English). In comparison to the embryo, the fetus has more recognizable external features and a more complete set of developing organs.
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.
The book was often cited as presenting the first images of a live fetus in utero. [14] In fact, Geraldine Flanagan's The First Nine Months Of Life had in 1962 compiled a similar set of fetal images from medical archives. [15] The images played an important role in debates about abortion and the beginning of human life. [16]
Photos of what pregnancy tissue from early abortions at 5 to 9 weeks actually looks like have gone viral.. The images, which were originally shared by MYA Network — a network of physicians who ...
Lennart Nilsson (24 August 1922 – 28 January 2017) [1] was a Swedish photographer noted for his photographs of human embryos and other medical subjects once considered unphotographable, and more generally for his extreme macro photography. He was also considered to be among Sweden ’s first modern photojournalists.
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]
Gestational age: 8 weeks and 0 days until 8 weeks and 6 days old. 57–63 days from last menstruation. Embryonic age: Week nr 7. 6 weeks old. 43–49 days from fertilization. The embryo measures 18 mm (3 ⁄ 4 in) in length. Fetal heart tone (the sound of the heart beat) can be heard using doppler. Nipples and hair follicles begin to form.
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 ...