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A seven-week-old human baby following a kinetic object. Infant vision concerns the development of visual ability in human infants from birth through the first years of life. The aspects of human vision which develop following birth include visual acuity, tracking, color perception, depth perception, and object recognition .
These hormones promote the production of insulin-like growth factor-1 (IGF-1), which plays a key role in the formation of new bone cells. Adequate nutrient intake is essential for the production of these hormones, which are critical for proper bone growth. However, a lack of proper nutrition can hinder this process and result in stunted growth.
Amniotic cavity in human embryo 1.3 mm. long The amniotic cavity is the closed sac between the embryo and the amnion, containing the amniotic fluid. The amniotic cavity is formed by the fusion of the parts of the amniotic fold, which first makes its appearance at the cephalic extremity and subsequently at the caudal end and sides of the embryo .
During birth, fontanelles enable the bony plates of the skull to flex, allowing the child's head to pass through the birth canal. The ossification of the bones of the skull causes the anterior fontanelle to close over by 9 to 18 months. [3] The sphenoidal and posterior fontanelles close during the first few months of life.
Nine-week-old human embryo from an ectopic pregnancy. Organogenesis is the development of the organs that begins during the third to eighth week, and continues until birth. Sometimes full development, as in the lungs, continues after birth. Different organs take part in the development of the many organ systems of the body.
Memory lane. Ellie Goulding looked back on her pregnancy journey on Thursday, June 3 — and showed her son, Arthur, for the first time. Inside Lauren Burnham, Arie Luyendyk Jr. and More Parents ...
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Newborn baby immediately after birth, covered in vernix Vernix caseosa , also known as vernix , is the waxy white substance found coating the skin of newborn human babies . [ 1 ] It is produced by dedicated cells and is thought to have some protective roles during fetal development and for a few hours after birth.