NCLEX HESI OB NOTES AND STUDY GUIDES FOR MATERNAL AND CHILD OB PEDS

NCLEX HESI OB NOTES AND STUDY GUIDES FOR MATERNAL AND CHILD OB PEDS 

Antepartum-stage of fertilization and fetal growth
47-40weeksIntrapartum- baby will DELIVER!! (Process of
Delivery) PostpartumFertilization and Implantation
Fertilization:
Occurs in the upper region of the fallopian tubes within 12 hours of ovulation and 2 to 3 days of
insemination, the average durations of viability for the ovum and sperm, respectively.
Once the ovum is fertilized, its membrane undergoes changes that prevent the entry of other
sperm.
Sperm carry an X and a Y chromosome: XY is male, XX female.
Implantation:
The zygote propels itself down the fallopian tube, toward the uterus.
Implantation in the uterine wall occurs 6 to 10 days after ovulation.
Stages of Pregnancy
The 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.
NCLEX HESI OB NOTES AND STUDY GUIDES
FOR MATERNAL AND CHILD OB PEDS
Fetal Development
Embryonic Stage
Before week 20 is considered abortion or miscarriege
Preterm 20 to 36 weeks
Full term 37-40
weeksPost term 41-
⇧
Week 1
Free-floating blastocyst
Weeks 2 to 3
The embryo is 1.5 to 2 mm long.
Lung buds appear.
Blood circulation begins.
The heart is tubular.
The neural plate becomes the brain and spinal cord.
Embryonic Stage
Week 5-
The 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 6-detect

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