ATI Maternity Proctored Exam Version 5 With Answers (181 Solved Questions)

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ANTEPARTUMStages of PregnancyThe third through eighth weeks after conception are called the embryonic stage.The fetal period starts 9 weeks after conception and lasts through the end of gestation.Fetal Development: Embryonic StageWeek 1Free-floating blastocystWeeks 2 to 3The embryo is 1.5 to 2 mm long.Lung buds appear.Blood circulation begins.The heart is tubular.The neural plate becomes the brainand spinal cord.Week 5The embryo is 0.4 to 0.5 cm long.The embryo weighs 0.4 g.Double heart chambers are visible.The heart beats.Limb buds begin to form.Week 8The embryo is 3 cm long.The embryo weighs 2 g.The eyelids begin to fuse.The circulatory system throughtheumbilical cord is well established.Every organ system is present.Week 12Fetus is 6 to 9 cm long.Fetus weighs 19 g.Face is well formed.Limbs are long and slender.Kidneys begin to form urine.Spontaneous movements occur.Heartbeat is detectable with aDoppler transducer between 10 and12 weeks.Sex is visually recognizable.Week 16Fetus is 11.5 to 13.5 cm long.Fetus weighs 100 g.Active movements are present.Skin is transparent.Lanugo hair begins to develop.Skeletal ossification takesplace.Week 20Fetus is 16 to 18.5 cm long.Fetus weighs 300 g.VERSION 5

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