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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 .
A newborn is, in colloquial use, a baby who is only hours, days, or weeks old; while in medical contexts, a newborn or neonate (from Latin, neonatus, newborn) is an infant in the first 28 days after birth [2] (the term applies to premature, full term, and postmature infants).
Infancy (9 C, 82 P) M. Middle age (3 C, 11 P) O. Old age (16 C, 34 P) Y. ... Pages in category "Human life stages" The following 7 pages are in this category, out of ...
Human embryonic development refers to the development and formation of the human embryo. It is characterised by the process of cell division and cellular differentiation of the embryo that occurs during the early stages of development. In biological terms, human development entails growth from a one-celled zygote to an adult human being.
Infants are usually born weighing between 5 pounds 8 ounces (2,500 g) and 8 pounds 13 ounces (4,000 g), but infants born prematurely often weigh less. [ 17 ] Newborns typically lose 7–10% of their birth weight in the first few days, but they usually regain it within two weeks.
By 2nd and 3rdmonth of their life, babies develop early consonant sounds like /k/ and /g/. The second half of the first year is the babbling phase where babies begin with repeated sounds like "babababa" or "mamamama". Infants vocalising more tend to develop stronger communication skills. [23] Early communication skills vary from child to child.
Pages in category "Infancy" ... Live birth (human) M. ... Neonatal hypoglycemia; Neonatal intensive care unit; Newborn care and safety; Nursing bra;
Fertilization of the ovum to form a new human organism, the human zygote. (day 1 of fertilization [1]) The zygote undergoes mitotic cellular divisions, but does not increase in size. This mitosis is also known as cleavage. A hollow cavity forms marking the blastocyst stage. (day 1.5–3 of fertilization. [1])