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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).
A 3D ultrasound of a human fetus aged 20 weeks. 3D ultrasound is a medical ultrasound technique, often used in fetal, cardiac, trans-rectal and intra-vascular applications. 3D ultrasound refers specifically to the volume rendering of ultrasound data.
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Fetal movements at the end of first trimester (early fetal stage) detected by 3D ultrasound. The parts of the fetal brain that control movement will not fully form until late in the second trimester, and the first part of the third trimester. [7]
Different regions of the uterus, and the vagina, displayed and labelled using a 3D medical illustration. In humans, the uterus is located within the pelvic region immediately behind and almost overlying the bladder, and in front of the sigmoid colon. The human uterus is pear-shaped and about 7.6 cm (3.0 in) long, 4.5 cm (1.8 in) broad (side to ...
The picture attracted a lot of attention when it was released, as it was used by opponents of abortion who asserted that the baby reached through the womb and grabbed the doctor's hand, thus showing signs of life at the 21st week of pregnancy. Indeed, the photograph and many of the texts which often accompany it seem to support this view ...
Prenatal development (from Latin natalis 'relating to birth') involves the development of the embryo and of the fetus during a viviparous animal's gestation.Prenatal development starts with fertilization, in the germinal stage of embryonic development, and continues in fetal development until birth.
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.