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The Gesell Developmental Schedules claimed that an appraisal of the developmental status of infants and young children could be made. The Gesell Developmental Schedule believes that human development unfolds in stages, or in sequences over a given time period. These stages were considered milestones, or the manifestations of mental development. [1]
Gestational age: 9 weeks and 0 days until 11 weeks and 6 days old. Embryonic age: 7 weeks and 0 days until 9 weeks and 6 days old. Fetus at 10 weeks. Embryo measures 30–80 mm (1.2–3.1 in) in length. Ventral and dorsal pancreatic buds fuse during the 8th week; Intestines rotate. Facial features continue to develop. The eyelids are more ...
[10] 1477 preterm infants born at <26 weeks gestation completed an 18-month neurodevelopmental follow-up assessment including the Receptive and Expressive Language Subscales of the BSID-III. [10] Abnormal feeding behaviors were reported in 193 (13%) of these infants at 18–22 months. [10]
Human embryology is the study of this development during the first eight weeks after fertilization. The normal period of gestation (pregnancy) is about nine months or 36 weeks. The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus.
Early childhood development is the period of rapid physical, psychological and social growth and change that begins before birth and extends into early childhood. [1] While early childhood is not well defined, one source asserts that the early years begin in utero and last until 3 years of age.
The first ten weeks of gestational age is the period of embryogenesis and together with the first three weeks of prenatal development make up the first trimester of pregnancy. From the 10th week of gestation (8th week of development), the developing embryo is called a fetus.
"Baby fat" continues to appear on thighs, upper arms and neck. Feet appear flat as arch has not yet fully developed. Both eyes work in unison (true binocular coordination). Can see distant objects (4 to 6 m or 13 to 20 ft away) and points at them. Motor development. Reaches with one hand leading to grasp an offered object or toy.
These developmental 'leaps' are said to begin with the baby becoming more insecure, clinging, and cranky, followed by a longer period in which the baby is more happy and learning new skills. They are predicted to occur at about 5, 8, 12, 17, 26, 36, 44, 53, 61-62 and 72-73 weeks old. [9]