Podcast
Questions and Answers
What defines the pre-embryonic stage of fetal development?
What defines the pre-embryonic stage of fetal development?
At what stage is organogenesis considered complete?
At what stage is organogenesis considered complete?
What significant development occurs at 3 months or 12 weeks?
What significant development occurs at 3 months or 12 weeks?
Nail beds forming, bone ossification begins, tooth buds present.
The fetus can swallow amniotic fluids by the end of the first trimester.
The fetus can swallow amniotic fluids by the end of the first trimester.
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What is the primary function of brown fat in a fetus?
What is the primary function of brown fat in a fetus?
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When do eyebrows and eyelashes become well-defined in the fetus?
When do eyebrows and eyelashes become well-defined in the fetus?
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At _____ weeks, the fetus's heartbeat is audible by a Doppler.
At _____ weeks, the fetus's heartbeat is audible by a Doppler.
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What starts happening at 6 months or 24 weeks in terms of immunity?
What starts happening at 6 months or 24 weeks in terms of immunity?
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The fetus is aware of sounds outside the mother's body by the seventh month.
The fetus is aware of sounds outside the mother's body by the seventh month.
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At what month does the fetus generally turn into a vertex or head-down presentation?
At what month does the fetus generally turn into a vertex or head-down presentation?
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Study Notes
Fetal Growth and Development Overview
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Pre-embryonic Stage:
- Lasts for the first 2 weeks post-fertilization.
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Embryonic Stage:
- Weeks 3 to 8, critical for organogenesis.
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Fetal Stage:
- Begins at week 8 and continues to birth.
First Trimester Development
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1 Month (4 Weeks):
- Embryonic disc formation with undefined features.
- Spinal cord formation initiated.
- Rudimentary heart appears as a bulge.
- Limb bud structures for arms and legs emerge.
- Basic formation of eyes, ears, and nose.
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2 Months (8 Weeks):
- Completion of organogenesis.
- Heart beats rhythmically.
- Facial features become discernible.
- Extremities fully developed; external genitalia present but not distinguishable.
- Primitive tail regresses; abdomen enlarges due to rapid growth of intestines.
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3 Months (12 Weeks):
- Nail beds start forming on fingers and toes.
- Ossification of bones begins.
- Presence of tooth buds.
- Sex differentiation observable externally.
- Kidneys begin secretion; heartbeat detectable with Doppler.
Second Trimester Development
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4 Months (16 Weeks):
- Fetal heart sounds audible via fetoscope.
- Lanugo fully formed, providing insulation.
- Liver and pancreas functional.
- Fetus swallows amniotic fluid, showing swallowing reflex.
- Sex determination possible via ultrasound.
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5 Months (20 Weeks):
- Quickening felt by multigravida.
- Antibody production begins.
- Hair development includes eyebrows and scalp.
- Meconium present in upper intestine; brown fat starts forming for thermoregulation.
- Fetal heartbeat audible via stethoscope.
- Vernix caseosa formation begins.
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6 Months (24 Weeks):
- Passive maternal antibody transfer starts, crucial for immunity.
- Meconium found in the rectum.
- Lung surfactant production begins; lungs mature.
- Full eyebrow, eyelash, and eye features; pupils reactive to light.
- Response to sound observed.
Third Trimester Development
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7 Months (32 Weeks):
- Subcutaneous fat deposits increase, changing appearance.
- Fetus can hear external sounds.
- Active Moro reflex present; birth position can be assumed.
- Iron stores begin development for neonatal needs.
- Fingernails grow to fingertip end.
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8 Months (36 Weeks):
- Further subcutaneous fat deposits.
- Sole of foot develops minimal creases.
- Lanugo decreases; vertex presentation common during this stage.
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9 Months (40 Weeks):
- Final stages of fetal development complete; active movements observed.
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Description
This quiz focuses on the stages of fetal growth and development as outlined in NCM 107. It explores pre-embryonic, embryonic, and fetal stages, emphasizing critical developments that occur from fertilization until birth. Test your knowledge on this essential topic in nursing education.
