Pregnancy Week 16 vs Week 20
Complete comparison of baby development, mom's symptoms, and changes between these weeks
📊
Time Difference
4 weeks apart
🔄
Trimester
Both in 2nd trimester
Baby Size Comparison
Growth Progress
Week 16Avocado
Week 20Banana
Your baby is approximately 45% through pregnancy
Week 16
📏
Length
4.6 inches
⚖️
Weight
3.5 ounces
🍎
Size Comparison
Avocado
Week 20
📏
Length
6.5 inches
⚖️
Weight
10.2 ounces
🍎
Size Comparison
Banana
What Changes Between Week 16 and 20?
👶New Baby Developments
- ✓Baby is swallowing more amniotic fluid (up to several ounces per day)
- ✓Hair is growing on the scalp, and eyebrows and eyelashes are visible
- ✓Lanugo (fine, downy hair) covers entire body to regulate temperature
- ✓Baby can hear sounds clearly and may respond by moving or changing heart rate
- ✓Regular sleep and wake cycles are developing with distinct active and rest periods
🤰New or Changing Symptoms
- ✓Halfway through pregnancy - a major milestone to celebrate!
- ✓Visible baby movements that may be seen moving across your belly
- ✓Increased white or clear vaginal discharge (leukorrhea)
- ✓Possible varicose veins in legs due to increased blood volume and pressure
- ✓Shortness of breath as uterus pushes up on diaphragm
📈Key Changes Summary
Baby Growth: Your baby continues to grow rapidly, with organs developing and maturing each day.
Your Body: Your body adapts to support your growing baby with various physical and hormonal changes.
Baby Development Milestones
Week 16 Development
- •Head and body proportions are becoming more balanced
- •Eyes are moving from sides to the front of the face
- •Ears are in their final position on the sides of the head
- •Muscles are getting stronger, allowing for more coordinated movements
- •Nervous system is functioning and connecting muscles to brain
- •Baby's heart is pumping about 25 quarts of blood per day
Week 20 Development
- •Baby is swallowing more amniotic fluid (up to several ounces per day)
- •Hair is growing on the scalp, and eyebrows and eyelashes are visible
- •Lanugo (fine, downy hair) covers entire body to regulate temperature
- •Baby can hear sounds clearly and may respond by moving or changing heart rate
- •Regular sleep and wake cycles are developing with distinct active and rest periods
- •Meconium (first bowel movement) is accumulating in intestines
Common Symptoms
Week 16 Symptoms
- •You may feel first flutters or "quickening" - the first fetal movements (more common in second pregnancies)
- •Backaches may begin as your center of gravity shifts forward
- •Increased clear or white vaginal discharge (leukorrhea)
- •Dry, itchy eyes from hormonal changes
- •Growing belly and possible "popped" appearance
- •Possible round ligament pain with sudden movements
Week 20 Symptoms
- •Halfway through pregnancy - a major milestone to celebrate!
- •Visible baby movements that may be seen moving across your belly
- •Increased white or clear vaginal discharge (leukorrhea)
- •Possible varicose veins in legs due to increased blood volume and pressure
- •Shortness of breath as uterus pushes up on diaphragm
- •Increased sweating and body temperature
Nutrition Tips
Week 16 Nutrition
- •Eat foods rich in vitamin A (700 mcg daily) like carrots, sweet potatoes, and leafy greens for eye development
- •Include DHA-rich foods (200mg daily) like salmon, sardines, walnuts, and flaxseeds for brain development
- •Stay hydrated with 10-12 glasses of water to support increased blood volume
- •Eat magnesium-rich foods like almonds, spinach, black beans, and avocados to prevent leg cramps
- •Include complex carbohydrates for sustained energy
- •Eat small, frequent meals to maintain blood sugar
Week 20 Nutrition
- •Eat iron-rich foods at every meal combined with vitamin C
- •Include vitamin C-rich foods (85mg daily) like oranges, strawberries, kiwi, and broccoli for iron absorption
- •Stay hydrated with 10-12 glasses of water to support increased blood volume
- •Eat calcium-rich foods (1000mg daily) at every meal
- •Include foods rich in vitamin K like leafy greens for blood clotting
- •Eat magnesium-rich foods to support muscle and nerve function
⚕️When to Contact Your Healthcare Provider
During weeks 16 to 20, contact your healthcare provider if you experience:
- •Severe abdominal pain or cramping
- •Heavy bleeding or passing clots
- •Severe headache with vision changes
- •Persistent fever over 100.4°F (38°C)
- •Sudden swelling of hands, face, or feet