What should I know about fetal development?

 

Day 1:fetus_week_8 Conception or Fertilization

The egg (23 chromosomes) is fertilized by a sperm (23 chromosomes) and they form one cell (46 chromosomes) that at first is smaller than a grain of sugar. This one cell contains the plans for every detail of the baby's development, including sex, hair and eye color, height and skin tone.

Day 5-9: New individual burrows into the wall of the womb.


Day 18-24: The baby's heart begins to beat.

Week 3:fetus_week_10 1 week after fertilization

The brain, spinal cord and nervous system develop.

Week 8: 6 weeks after fertilization

All body systems are present. The lungs are forming, brain waves are recorded, muscles work together, and reflexes are present.

Week 10: 8 weeks after fertilization

The body is complete. Changes after this are primarily in size, rather than appearance.

Month 3: 10 weeks after fertilization

Shows the lung and brain growth largely completed. The baby can hear, suck her thumb, and her fingers can grasp objects. Her fingerprints are already evident. The baby can even wrinkle her forehead!

fetus_month_3


Month 4:  14 weeks after fertilization
At this age, the baby reacts to loud noises.  Fingerprints which individualize each human being have now developed on the tiny fingers of the fetus.

           fetus_month_4

By End of Month 4: The baby is 8 to 10 inches long and weighs a half-pound or more. The heart pumps 16 gallons of blood every day and the mother can now feel movement.

Months 5-6: The baby grows to be about 12 inches long.  If born this early, has a chance to survive outside the womb with medical intervention.

Months 7, 8 & 9: The baby uses the 4 senses of vision, hearing, taste and touch. The baby can recognize its mother's voice. Eyelids open and close, eyes look around.

By End of Month 9: The baby normally weighs 6-9 lbs. and is now ready for birth.


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The information contained on this site is for educational purposes only and is not meant for diagnosis or treatment. Any information found on this site should be discussed with a health care professional. Use of this information should be done in accordance with the health care plan outlined by your health care professional. For specific medical advice, diagnosis and treatment, consult your doctor.
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