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Pregnancy Chart

Pregnancy Chart: A Comprehensive Guide to Your Journey

Pregnancy is an extraordinary journey that transforms a woman’s body and life. To navigate this journey with confidence and knowledge, it is essential to understand the changes that occur throughout the 40-week gestation period. A pregnancy chart provides a valuable tool for expectant mothers, offering a week-by-week breakdown of fetal development, maternal changes, and important milestones.

First Trimester (Weeks 1-12)

Week 1-4:

  • Conception occurs when an egg is fertilized by sperm, marking the start of pregnancy.
  • The fertilized egg travels through the fallopian tube and implants in the lining of the uterus.
  • The placenta, which provides nutrients and oxygen to the developing fetus, begins to form.
  • The embryo, the early stage of fetal development, starts to take shape.

Week 5-8:

  • The embryo’s heart begins to beat.
  • The neural tube, which will develop into the brain and spinal cord, forms.
  • The embryo’s limbs and facial features begin to develop.
  • Morning sickness, fatigue, and breast tenderness are common symptoms.

Week 9-12:

  • The fetus, now fully formed, is about the size of a grape.
  • The fetus’s organs continue to develop, including the kidneys, liver, and lungs.
  • The fetus begins to move and kick.
  • The mother’s uterus expands and her belly begins to show.

Second Trimester (Weeks 13-27)

Week 13-16:

  • The fetus grows rapidly, reaching about the size of a lemon.
  • The fetus’s bones begin to harden.
  • The fetus’s hair and nails start to grow.
  • The mother’s energy levels may increase, and morning sickness usually subsides.

Week 17-20:

  • The fetus is about the size of a pear.
  • The fetus’s eyelids open and it can make facial expressions.
  • The fetus’s sex can be determined through an ultrasound.
  • The mother’s uterus is about the size of a grapefruit.

Week 21-24:

  • The fetus is about the size of a cantaloupe.
  • The fetus’s lungs continue to develop and it begins to practice breathing.
  • The mother’s belly continues to grow and she may experience back pain.

Week 25-27:

  • The fetus is about the size of a coconut.
  • The fetus’s senses are developing, and it can hear sounds and respond to light.
  • The mother’s uterus is about the size of a basketball.

Third Trimester (Weeks 28-40)

Week 28-31:

  • The fetus is about the size of a pineapple.
  • The fetus’s brain continues to develop rapidly.
  • The fetus’s lungs are almost fully developed.
  • The mother’s body prepares for labor by releasing hormones that soften the cervix.

Week 32-35:

  • The fetus is about the size of a honeydew melon.
  • The fetus’s body becomes rounder and it gains fat.
  • The fetus’s head is engaged in the mother’s pelvis.
  • The mother’s Braxton Hicks contractions become more frequent.

Week 36-39:

  • The fetus is about the size of a watermelon.
  • The fetus’s lungs are fully developed and it is ready to be born.
  • The mother’s cervix continues to dilate and efface.
  • The mother may experience nesting instincts and increased anxiety.

Week 40:

  • The average due date for a pregnancy.
  • The fetus is fully developed and weighs between 6 and 9 pounds.
  • The mother’s body is ready for labor and delivery.
  • Labor typically begins with contractions that gradually increase in intensity and frequency.

Important Milestones

Throughout pregnancy, there are several important milestones that expectant mothers should be aware of:

  • First prenatal visit: Typically scheduled around 8 weeks of pregnancy, this visit involves a physical exam, blood tests, and a discussion of prenatal care.
  • Ultrasound scans: These scans provide images of the fetus and can be used to assess fetal growth and development.
  • Non-stress test (NST): This test monitors the fetus’s heart rate and movement to assess its well-being.
  • Biophysical profile (BPP): This test combines an NST with an ultrasound to provide a more comprehensive assessment of fetal health.
  • Labor and delivery: The culmination of pregnancy, labor and delivery involve the birth of the baby.

Tips for Using a Pregnancy Chart

  • Use the chart as a general guide, as each pregnancy is unique.
  • Track your symptoms and appointments to compare them to the chart.
  • Consult with your healthcare provider if you have any concerns or questions.
  • Stay informed about prenatal care and the changes that occur during pregnancy.


A pregnancy chart is an invaluable resource for expectant mothers, providing a comprehensive overview of the journey from conception to birth. By understanding the changes that occur throughout pregnancy, women can navigate this transformative experience with confidence and knowledge. Remember to consult with your healthcare provider for personalized guidance and support throughout your pregnancy.

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