A Complete Guide on What Not to Do in Your Third Trimester of Pregnancy?

Pregnancy is a journey that lasts up to 40 weeks, and the third trimester, spanning from 28 to 40 weeks, can be both emotionally and physically challenging for expectant mothers. As you approach Week 37, your baby is considered full-term, and delivery becomes imminent.

To alleviate any anxiety during these final weeks, it’s crucial to understand what to expect during the third trimester and what precautions to take. Let’s explore the changes in a woman’s body, the baby’s development, and what actions to avoid in the third trimester of pregnancy.

Changes in a Woman’s Body During the Third Trimester:

During the third trimester, a woman’s body undergoes significant changes in preparation for childbirth. Here are some of the key transformations:

  1. Weight and Size Gain: As the baby grows, the uterus expands, leading to a noticeable increase in weight and size. This growth can result in discomfort, back pain, and difficulty finding a comfortable sleeping position, all while increasing pressure on the limbs.
  2. Fetal Movements: Fetal movements become more pronounced and frequent during this period. Expect to feel stronger and more consistent kicks, rolls, and stretches as your baby becomes more active.
  3. Back Pain and Abdominal Pressure: The expanding uterus and changes in the baby’s position can exert pressure on the lower back and abdomen, often resulting in back pain and discomfort. This discomfort is due to the relaxation of joints and the expansion of ligaments to accommodate the growing uterus.
  4. Swelling and Water Retention: Swelling, particularly in the hands, feet, and ankles, is common during the third trimester. Increased uterine pressure on blood vessels can lead to fluid retention and reduced circulation.
  5. Braxton Hicks Contractions: These are practice contractions that prepare the uterus for labor. While less painful and sporadic than actual labor contractions, they are a normal part of the third trimester experience.

Fetal Development During the Third Trimester:

As for the baby’s development during this stage:

  • By the 32nd week, your baby’s bones are fully developed, and their eyes are open, allowing them to perceive light.
  • The baby begins to retain minerals like calcium and iron.
  • Ideally, the baby should assume a head-down position by the 36th week. If not, your doctor may recommend interventions such as a caesarean delivery.
  • After the 37th week, your baby is considered full-term, measuring between 19 to 21 inches tall and weighing between 6 to 9 pounds.

What to Avoid During the Third Trimester:

While navigating the third trimester, there are certain precautions expectant mothers should take:

  1. Avoid Excessive Physical Exertion: Pushing your physical limits during the third trimester can lead to fatigue, pain, and potential risks. Steer clear of heavy lifting, strenuous exercises, and stressful activities. Instead, opt for gentle exercises like swimming, prenatal yoga, or walking.
  2. Minimize Stress and Overexertion: Excessive stress and activity can have adverse effects on your physical and emotional well-being. These factors may exacerbate issues like premature labor and high blood pressure. Prioritize self-care, practice relaxation techniques, seek support from friends and family, and consider prenatal classes or support groups.
  3. Stay Clear of Harmful Substances: Be cautious about exposure to harmful substances, especially during the third trimester when your baby’s organs are maturing. Avoid tobacco smoke, secondhand smoke, and minimize contact with household chemicals and pesticides. Also, be mindful of strong chemical-based beauty products.
  4. Maintain a Healthy Diet: Stick to a balanced diet, steering clear of processed foods high in sugar and caffeine. Opt for nutrient-rich foods like fruits, vegetables, lean protein, whole grains, and low-fat dairy products. Limit sweetened beverages and stay well-hydrated.
  5. Exercise Caution with Medications and Supplements: Always consult your healthcare provider before taking any new supplements or medications, including over-the-counter options. Some compounds may not be safe during pregnancy, so it’s crucial to seek professional guidance.


The third trimester is a critical phase of pregnancy that requires special attention and care. By following these guidelines, expectant mothers can prioritize their health and the well-being of their growing baby. However, if you experience any complications despite these precautions, don’t hesitate to consult a trusted gynecologist for guidance.

Please note that this article provides general information and is not a substitute for professional medical advice. Always consult your healthcare provider for personalized guidance during pregnancy.

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