Exam 2 Flashcards
3 developmental periods
Germinal
Embryonic
Fetal
Teratogens
Medications Illness Alcohol Radiation Injury
Germinal period
2 weeks
Union of ovum and sperm
Rapid cell division
Implantation into the uterine lining
Embryonic period
2 weeks - 8th week
Development of placenta, umbilical cord, and amniotic fluid
Embryonic disc changes
Ectoderm
Outer layer
Skin
Neurology
Mesoderm
Middle layer
Blood
Muscles
Excretory system
Endoderm
Inner layer
Digestive
Endocrine
Fetal period
9weeks to delivery
Major period of function and maturation
Critical periods
Critical Period
Periods of feral development that an accident here for a fetus would be very intense and likely harmful. Damage dependent on timing, intensity, duration type of toxin and threshold.
Age of viability
Age in weeks where a fetus has a 50% chance of surviving outside the womb (21-22 weeks) keep in mind that the longer the baby stays. In the womb the better there chance of survival goes up.
Three development trends
Cephalocaudal
Promiximodistal
Gross to specific
Psychosocial issues
Identification of a new role
Socialization
Ability to provide
Decisions about the baby
Chronic villus sampling
Done early 8-12 weeks
Amniocentesis
Done 14th-20th
Leboyer method
Quiet room
Baby delivered into water to make birth less dramatic