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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.
Gestational age: 3 weeks and 0 days until 3 weeks and 6 days old. 22–28 days from last menstruation. Embryonic age: Week nr 2. 1 week old. 8–14 days from fertilization.
Louise Joy Brown (born 25 July 1978) is an English woman noted as the first human born following conception by in vitro fertilisation (IVF). Her birth, following a procedure pioneered in Britain, has been lauded among "the most remarkable medical breakthroughs of the 20th century".
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.
Gravidus and gravid come from the Latin word meaning "heavy" and a pregnant female is sometimes referred to as a gravida. [19] Gravidity refers to the number of times that a female has been pregnant. Similarly, the term parity is used for the number of times that a female carries a pregnancy to a viable stage. [20]
[2] [3] A trial of vaginal birth after C-section may be possible. [2] The World Health Organization recommends that caesarean section be performed only when medically necessary. [3] [4] A C-section typically takes 45 minutes to an hour. [2] It may be done with a spinal block, where the woman is awake, or under general anesthesia. [2]
A timeline of the ongoing murder trial of Kaitlin Armstrong, on trial for the murder of pro cyclists Moriah "Mo" Wilson.
Linear growth takes place in the epiphyseal growth plates (EGP) of long bones. [23] In the growth plate, chondrocytes proliferate, hypertrophy and secrete cartilage extracellular matrix. New cartilage is subsequently remodeled into bone tissue, causing bones to grow longer. [24]