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D202: WGU OA Study Guide

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Human development life stages - Answer prenatal infancy toddlerhood early childhood middle childhood late childhood adolescence early adulthood middle adulthood late adulthood Germinal Period - Answer first 14 days fertilization implantation of zygote creation of blastocyst zygote - Answer fertilized ovum blastocyst - Answer embryo before implantation into uterine wall Embryonic Period - Answer weeks 3-8 called embryo some fail to chromosomal abnormalities placenta formed brain begins to develop at 3 weeks embryo - Answer developing mammal following conception; first 8 weeks Chromosomal abnormality - Answer occurs when a child inherits too many or too few chromosomes Fetal Period - Answer weeks 8+ viability about 24 weeks

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D202: WGU OA Study Guide
Human development life stages - Answer prenatal

infancy

toddlerhood

early childhood

middle childhood

late childhood

adolescence

early adulthood

middle adulthood

late adulthood



Germinal Period - Answer first 14 days

fertilization

implantation of zygote

creation of blastocyst



zygote - Answer fertilized ovum



blastocyst - Answer embryo before implantation into uterine wall



Embryonic Period - Answer weeks 3-8

called embryo

some fail to chromosomal abnormalities

placenta formed

brain begins to develop at 3 weeks



embryo - Answer developing mammal following conception; first 8 weeks



Chromosomal abnormality - Answer occurs when a child inherits too many or too few
chromosomes



Fetal Period - Answer weeks 8+

viability about 24 weeks

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