Growth Journey Slides Growth Journey
"Mapping the extraordinary 40-week transformation from a single cell to a complex human life."
Psychology: Unit 1 Lesson 1.1
The Ultimate Time-Lapse
"If you could see through time, what specific week of pregnancy marks the moment a heart starts beating?"
Week 3
Week 8
Week 12
Hold your answer... we'll find out in 3 slides.
Biological Roadmap
1. Germinal
Conception to 2 Weeks
Rapid cell division
Zygote formation
Implantation in uterus
2. Embryonic
2 to 8 Weeks
Major organs form
Heart begins to beat!
Highly vulnerable stage
3. Fetal
9 Weeks to Birth
Brain development
Movement & growth
Survival preparation
Trimester Breakdown
1st Trimester
Foundation
Weeks 1-12
2nd Trimester
Specialization
Weeks 13-27
3rd Trimester
Readiness
Weeks 28-40
Note: Biological periods and Trimesters overlap but have different focus points.
The Threshold of Viability
Definition
The point at which a fetus can survive outside the mother's womb.
24 Weeks
Average Viability
Critical Factor: Lung Maturity
Before 24 weeks, the lungs and brain are typically not developed enough to sustain life without extreme intervention.
Developmental Blueprint Worksheet Developmental Blueprint
Psychology: Prenatal Development • Lesson 1.1
Name:
Date:
Objective: Chart the biological roadmap from conception to birth. Identify the unique physiological changes that occur during the three primary periods of prenatal development.
Part 1: The Biological Periods
1. Germinal Period (Conception – 2 Weeks)
Key Biological Processes:
Defining Event:
2. Embryonic Period (2 Weeks – 8 Weeks)
Key Biological Processes:
Defining Event:
3. Fetal Period (9 Weeks – Birth)
Key Biological Processes:
Defining Event:
Part 2: The Timeline Analysis
Week 0 Week 10 Week 20 Week 30 Week 40
Label where the following occur on the timeline above: Conception, Viability, End of 1st Trimester.
1. Why is the Embryonic period considered the "critical period" for major organ development? What happens if this stage is interrupted?
2. Explain the "Threshold of Viability." What biological factors are the primary determinants of whether a baby can survive outside the womb at 24 weeks?
3. How do the three "Trimesters" differ from the three "Biological Periods"? (Hint: Think about timeframes and medical focus).
Growth Stages Answer Key Teacher Answer Key
Developmental Blueprint Worksheet • Lesson 1.1
Internal Use Only
Part 1: The Biological Periods
1. Germinal Period (Conception – 2 Weeks)
Key Processes:
Rapid cell division (mitosis)
Creation of the zygote
Movement down the fallopian tube
Defining Event: Implantation in the uterine wall.
2. Embryonic Period (2 Weeks – 8 Weeks)
Key Processes:
Organogenesis (major organs form)
Development of the nervous system and neural tube
External features (limbs, facial features) begin to appear
Defining Event: The heart begins to beat (around week 3-4).
3. Fetal Period (9 Weeks – Birth)
Key Processes:
Significant physical growth and weight gain
Refinement of organs and systems
Preparation for sensory experiences (hearing, movement)
Defining Event: Reaching viability and eventual birth.
Part 2: Timeline & Analysis
1. Why is the Embryonic period considered the "critical period"?
It is the stage of Organogenesis. Because all major organ systems (heart, brain, digestive system) are forming simultaneously, any disruption from environmental factors (teratogens) can cause permanent, structural defects. If interrupted, the fetus may suffer from congenital anomalies or the pregnancy may terminate.
2. Explain the "Threshold of Viability."
The threshold is generally considered 24 weeks. The primary determinants are lung maturity (ability to exchange oxygen) and brain development (ability to regulate basic life functions like breathing and temperature). With modern NICU technology, survival is possible but carries high risk of complications.
3. Trimesters vs. Biological Periods?
Biological Periods are defined by developmental milestones (zygote, organ formation, growth). Trimesters are 3-month medical blocks (13 weeks each) used by doctors to track pregnancy progress and schedule prenatal care. The first trimester includes both the Germinal and Embryonic periods and the start of the Fetal period.
Vulnerability Windows Slides Vulnerability Windows
"Understanding Teratogens and the Critical Periods of Human Development."
Psychology: Unit 1 Lesson 1.2
What is a Teratogen?
Any agent—biological, chemical, or physical—that can cause a birth defect or negatively affect cognitive and behavioral outcomes.
Legal Drugs
Alcohol, Nicotine
Illegal Drugs
Cocaine, Heroin
Diseases
Rubella, Zika, HIV
Environment
Radiation, Lead
Timing is Everything
The "Critical Period"
A specific time in development when certain organ systems are formed.
"If exposure occurs during the peak of an organ's development, the structural damage is most severe."
Risk Level by Stage:
Germinal
Low*
Embryonic
CRITICAL
Fetal
Moderate
*Exposure in germinal period usually results in "all-or-nothing" (miscarriage or survival without defects).
Alcohol & FASD
Fetal Alcohol Spectrum Disorders
Alcohol crosses the placenta easily. The fetus's liver is not developed enough to process it.
Primary Effects:
Facial deformities (structural)
Intellectual disabilities (cognitive)
Impulse control issues (behavioral)
Rule of Thumb:
NO SAFE AMOUNT
Medical Detective Case Files Medical Detective Case Files
Bureau of Developmental Research • Case Assignment 1.2
Investigator:
Case Date:
Confidential Case Briefing: Analyze the maternal histories below to identify potential teratogens and their timing of impact.
CASE ID: 001-A
Scenario A: The "Flu" that wasn't
"The mother reports a high fever and a distinctive rash during Week 6 of her pregnancy. She lived in a coastal region with a high mosquito population. The infant was born with microcephaly (a significantly smaller head size) and vision impairment."
1. Potential Teratogen:
2. Biological Period of Exposure:
Detective Logic:
Based on the 'Critical Periods' chart, why did this specific teratogen affect brain size at this specific week?
CASE ID: 002-B
Scenario B: The Social Smoker
"A mother continued to smoke heavily throughout her entire 40-week pregnancy. The baby was born full-term but had an extremely low birth weight (below 5 lbs) and showed signs of respiratory distress."
1. Potential Teratogen:
2. Primary Effect on Growth:
Detective Logic:
Tobacco restricts oxygen to the fetus. Why is low birth weight a 'behavioral/growth' issue rather than a 'structural' defect?
Part 2: The Critical Windows Chart
Match the organ system to its most vulnerable period of structural development. Use your class notes or slides.
Organ System Most Vulnerable Weeks Likely Structural Defect Heart Weeks 3 – 6.5 Central Nervous System Weeks 3 – Birth Eyes / Ears Weeks 4.5 – 9 Limbs (Arms/Legs) Weeks 4 – 8
Investigation Conclusion
"Summarize the relationship between exposure timing and the severity of birth defects. Why does an exposure in Week 5 usually cause more physical damage than an exposure in Week 35?"
Case Files Answer Key Teacher Answer Key
Medical Detective Case Files • Lesson 1.2
Medical Examiner Use Only
Part 1: Case Study Analysis
Scenario A: The Zika Virus
Teratogen: Zika Virus
Biological Period: Embryonic Period (Week 6)
Detective Logic:
Week 6 is a critical window for the Central Nervous System (CNS) and brain development. Viral interference at this stage can disrupt the migration of neurons, leading to permanent structural damage like microcephaly.
Scenario B: Tobacco / Nicotine
Teratogen: Tobacco/Nicotine (Carbon Monoxide)
Effect: Low Birth Weight / IUGR (Intrauterine Growth Restriction)
Detective Logic:
Tobacco acts as a vasoconstrictor, reducing oxygen and nutrients to the fetus. It affects overall growth (weight/size) throughout the fetal period rather than creating a specific structural defect like a missing limb.
Part 2: The Critical Windows Table
<table class="w-full border-collapse border border-slate-200 text-sm"><tbody><tr class="bg-slate-100 font-bold uppercase text-[10px]"><td class="border border-slate-200 p-2">System</td><td class="border border-slate-200 p-2">Likely Structural Defect</td></tr><tr><td class="border border-slate-200 p-2 font-bold">Heart</td><td class="border border-slate-200 p-2 italic">Congenital heart disease, septal defects (holes in the heart).</td></tr><tr><td class="border border-slate-200 p-2 font-bold">CNS</td><td class="border border-slate-200 p-2 italic">Neural tube defects (spina bifida), microcephaly, intellectual disability.</td></tr><tr><td class="border border-slate-200 p-2 font-bold">Eyes / Ears</td><td class="border border-slate-200 p-2 italic">Cataracts, blindness, deafness.</td></tr><tr><td class="border border-slate-200 p-2 font-bold">Limbs</td><td class="border border-slate-200 p-2 italic">Stunted growth, missing fingers/toes, malformed limbs.</td></tr></tbody></table>
Investigation Conclusion Key
Timing is the primary determinant of defect severity. Exposure in the Embryonic period (Weeks 3-8) is most damaging because this is when Organogenesis occurs—the fundamental structure of the body is being built. By Week 35 (Fetal Period), the structures are mostly formed, and exposure is more likely to cause growth issues or functional/cognitive delays rather than major physical deformities.
Womb World Discovery Slides Womb World Discovery
"Inside the Sensory Life of a Fetus: Can they learn before they're born?"
Psychology: Unit 1 Lesson 1.3
The Prenatal Soundscape
The womb is NOT a silent place. It is a rhythmic, muffled environment of about 70–80 decibels.
Primary Sounds:
Maternal Heartbeat
Digestion (Whooshing)
Maternal Voice
"Imagine listening to the world while underwater in a bathtub."
Lower frequencies (voice, music) pass through easily; higher frequencies are filtered out.
Flavor Memory
Amniotic Fluid
Flavors from the mother's diet (garlic, vanilla, mint, carrot) diffuse into the amniotic fluid.
Research Fact:
Newborns show a preference for flavors their mothers ate during the 3rd trimester.
The "Habituation" Lab
If a fetus hears a loud sound repeatedly, their heart rate eventually stops spiking.
What this proves:
Learning is occurring.
The Cat in the Hat Study
Mothers read "The Cat in the Hat" aloud twice a day for the last 6 weeks of pregnancy.
The Result
After birth, babies sucked more vigorously on a pacifier when they heard that specific story versus a different one.
Conclusion: Fetuses recognize rhythmic patterns and the "melody" of their mother's native language.
Prenatal Learning Lab Prenatal Learning Lab
Scientific Inquiry: Fetal Perception • Lesson 1.3
Researcher:
Period:
Inquiry Question: To what extent can the human brain process and store information before birth? Analyze the following research summaries to draw conclusions.
Case Study 1: The Rhythmic Recognition
Experimental Setup:
Researchers played a specific 10-second melody to fetuses 3 times a day starting at Week 34. After birth, they played the same melody and monitored the infants' brain waves (EEG) and heart rates.
Observations:
Infants showed a "familiarity" response (relaxed heart rate, increased attention) to the specific melody, but not to a similar melody with a different tempo.
Analysis Question:
What does this suggest about the fetal brain's ability to store rhythmic information? Does this mean the baby "remembers"?
Case Study 2: The Carrot Juice Experiment
Experimental Setup:
Pregnant women were split into two groups. Group A drank carrot juice 4 days a week for the last 3 weeks of pregnancy. Group B drank only water. After birth, infants were given cereal made with carrot juice or plain water.
Observations:
Infants in Group A made fewer "negative facial expressions" and ate more of the carrot-flavored cereal compared to Group B.
Analysis Question:
Explain how this form of "prenatal learning" might have an evolutionary benefit for a newborn's survival.
Critical Synthesis
1. Habituation vs. Conscious Learning
Psychologists argue that fetal "learning" is actually Habituation —becoming accustomed to a stimulus. How is this different from the type of learning you do in school?
2. The "Mozart Effect" Myth
Based on what you've learned about the fetal soundscape (70-80dB of whooshing sounds), why might playing classical music to a "bump" not actually make the baby smarter?
Reflex Survival Guide Slides The Reflex Olympics
"Survival Instincts: Decoding the Innate Behaviors of a Newborn."
Psychology: Unit 1 Lesson 1.4
Biological Programming
Reflex: An unlearned, involuntary response to a specific stimulus.
Why do they exist?
They help newborns survive the transition from the womb to the outside world before their brains are mature enough for voluntary action.
The Lifespan
Most neonatal reflexes disappear within the first 6-12 months as they are replaced by voluntary motor control.
The Feeding Kit
1. Rooting
Trigger: Stroke the baby's cheek.
Response: Baby turns head toward the touch and opens mouth.
Purpose: Finding food.
2. Sucking
Trigger: Object placed in mouth.
Response: Automatic rhythmic sucking.
Purpose: Feeding.
Observation Activity Space
Protective & Ancestral
Moro (Startle)
Trigger: Loud noise or sudden drop.
Response: Arching back, flinging arms out, then pulling them in.
Evolutionary Link: Grabbing for the mother if falling.
Palmar Grasp
Trigger: Pressure on the palm.
Response: Tight grip of the hand.
Evolutionary Link: Holding onto fur/caregiver.
Babinski
Trigger: Stroking the sole of the foot.
Response: Toes fan out and foot curls inward.
Significance: Neural health check.
Stepping
Trigger: Holding baby upright with feet on surface.
Response: One foot in front of the other.
Significance: Motor pattern foundation.
Reflex Olympics Board Worksheet Reflex Olympics Board
NEONATAL SPRINT • EVENT LOG 1.4
Competitor:
Task: Observe the "Reflex Simulation" descriptions and correctly identify the reflex, its trigger, and its primary evolutionary purpose.
Event #1
The Description
"The infant tightly curls their fingers around the researcher's pinky finger."
Identify Reflex
Evolutionary Purpose
Event #2
The Description
"The room door slams. The infant arches their back, throws their arms out, and starts crying."
Identify Reflex
Evolutionary Purpose
Event #3
The Description
"A mother touches the corner of the baby's mouth. The baby turns their head and starts searching."
Identify Reflex
Evolutionary Purpose
The Disappearing Act
1. Why do most of these reflexes (like the Moro and Palmar Grasp) disappear between 4 and 6 months of age?
Think about the development of the brain's cerebral cortex.
2. Predict: What would it suggest to a pediatrician if a 12-month-old child still exhibited a strong Babinski or Moro reflex?
Evolutionary Theory Bonus
Some researchers believe the "Stepping Reflex" is a vestigial trait left over from our primate ancestors. Why would "stepping" be less important for a human newborn compared to a newborn gazelle or horse?
APGAR Assessment Slides The First Minute
"Emergency Triage: Master the APGAR Scale and Newborn Assessment."
Psychology: Unit 1 Lesson 1.5
What is APGAR?
Developed by Dr. Virginia Apgar in 1952, it is a quick test performed at 1 minute and 5 minutes after birth.
Total Scoring:
7–10: Good Condition
4–6: Needs Assistance
0–3: Emergency Care
The Acronym
Appearance (Color)
Pulse (Heart Rate)
Grimace (Reflexes)
Activity (Muscle Tone)
Respiration (Breathing)
The Scoring Matrix
Category 0 Points 1 Point 2 Points Pulse Absent < 100 bpm > 100 bpm Breathing Absent Slow/Weak Strong Cry Color Blue/Pale Body Pink/Blue ext. All Pink
*Full matrix provided on your Scenario Worksheet.
Triage Challenge
Scenario #1
"The infant is born with a heart rate of 110 bpm. They have a strong cry, but their hands and feet are slightly blue. They are moving their limbs vigorously and pull away when their nose is suctioned."
?
Calculate Score
?
Determine Care
ER Intake Scenarios Worksheet ER Intake Scenarios
Neonatal Health Assessment • Lesson 1.5
Attending:
APGAR Scoring Reference Matrix
<table class="w-full text-[10px] border-collapse"><tbody><tr class="bg-slate-100 font-bold uppercase text-slate-500"><td class="border border-slate-200 p-2">Category</td><td class="border border-slate-200 p-2">0 Points</td><td class="border border-slate-200 p-2">1 Point</td><td class="border border-slate-200 p-2">2 Points</td></tr><tr><td class="border border-slate-200 p-2 font-bold uppercase">Appearance</td><td class="border border-slate-200 p-2 italic">Blue or Pale</td><td class="border border-slate-200 p-2 italic">Pink body, blue limbs</td><td class="border border-slate-200 p-2 italic">Completely pink</td></tr><tr><td class="border border-slate-200 p-2 font-bold uppercase">Pulse</td><td class="border border-slate-200 p-2 italic">Absent</td><td class="border border-slate-200 p-2 italic">Below 100 bpm</td><td class="border border-slate-200 p-2 italic">Above 100 bpm</td></tr><tr><td class="border border-slate-200 p-2 font-bold uppercase">Grimace</td><td class="border border-slate-200 p-2 italic">No response</td><td class="border border-slate-200 p-2 italic">Grimace / weak cry</td><td class="border border-slate-200 p-2 italic">Cough, sneeze, cry</td></tr><tr><td class="border border-slate-200 p-2 font-bold uppercase">Activity</td><td class="border border-slate-200 p-2 italic">Limp / Flaccid</td><td class="border border-slate-200 p-2 italic">Some flexion</td><td class="border border-slate-200 p-2 italic">Active motion</td></tr><tr><td class="border border-slate-200 p-2 font-bold uppercase">Respiration</td><td class="border border-slate-200 p-2 italic">Absent</td><td class="border border-slate-200 p-2 italic">Slow / Irregular</td><td class="border border-slate-200 p-2 italic">Strong cry</td></tr></tbody></table>
Case ID: 501-A
Patient Case: Baby "M"
"Baby M is born after a long labor. At 1 minute, the heart rate is 95 bpm. The baby is crying weakly and has a slow, irregular breathing pattern. Their arms and legs are slightly flexed but not moving much. The body is pink, but the hands and feet are noticeably blue."
A
P
G
A
R
Total Score:
Action Required:
Case ID: 502-B
Patient Case: Baby "L"
"Baby L is born quickly. At 1 minute, the baby has no pulse and is not breathing. The entire body is a pale blue color and the limbs are limp. There is no response when the nose is suctioned."
A
P
G
A
R
Total Score:
Action Required:
Assessment Reflection
1. The 5-Minute Marker
Why is the APGAR score repeated at 5 minutes? What does a significant increase in the score (e.g., from a 4 to an 8) tell the medical team?
Assessment Logic Answer Key Teacher Answer Key
ER Intake Assessment Scenarios • Lesson 1.5
Medical Staff Only
Case ID: 501-A (Baby M)
<table class="w-full text-xs mb-4 border-collapse"><tbody><tr class="bg-white"><td class="border p-2 font-bold w-1/4">A - Appearance</td><td class="border p-2">1 (Pink body, blue limbs)</td><td class="border p-2 font-bold w-1/4">P - Pulse</td><td class="border p-2">1 (Below 100 bpm)</td></tr><tr class="bg-white"><td class="border p-2 font-bold">G - Grimace</td><td class="border p-2">1 (Weak cry/grimace)</td><td class="border p-2 font-bold">A - Activity</td><td class="border p-2">1 (Some flexion)</td></tr><tr class="bg-white"><td class="border p-2 font-bold">R - Respiration</td><td class="border p-2" colspan="3">1 (Slow/Irregular)</td></tr></tbody></table>
Total Score: 5
Action: Assistance Required.
Neonatal team should provide stimulation, warming, and possibly supplemental oxygen/ventilation.
Case ID: 502-B (Baby L)
<table class="w-full text-xs mb-4 border-collapse"><tbody><tr class="bg-white"><td class="border p-2 font-bold w-1/4">A/P/G/A/R</td><td class="border p-2">0 across all categories.</td></tr></tbody></table>
Total Score: 0
Action: Emergency Care / Resuscitation.
Immediate life-saving measures required (CPR, intubation, emergency drugs).
Reflection Questions Key
1. The 5-Minute Marker?
The 5-minute score assesses the infant's response to medical intervention. A significant increase suggests the baby is successfully adapting to extra-uterine life after initial assistance. If the score remains low at 5 minutes, it indicates a higher risk of long-term health complications.
2. Limitations of APGAR?
APGAR is a clinical triage tool, not a long-term predictor of IQ or personality. Many infants with low 1-minute scores go on to live perfectly healthy lives with no developmental delays. It only measures immediate physical vitality and survival readiness.
