Week 21 of Pregnancy: Grapefruit-Sized Wonders and Maternal Milestones

Baby Size at Week 21: Your baby is now the size of a juicy grapefruit, measuring around 10.5 inches (267 mm) from crown to rump. They weigh approximately 12.7 ounces (360 grams). At this stage, your little one’s taste buds are developing, and they can swallow and digest amniotic fluid.

Changes and State in the Mother’s Body: As you enter week 21, your uterus continues to expand, and you may notice your baby bump becoming more prominent. You might feel your baby’s movements more frequently and distinctly. Additionally, you might experience some mild swelling in your hands, feet, and ankles due to fluid retention.

Common Symptoms:

  • Increased energy: Many women experience a surge of energy during the second trimester. Take advantage of this and tackle any pending tasks or engage in enjoyable activities.
  • Skin changes: Hormonal fluctuations can lead to changes in your skin, such as acne, darkening of the skin in certain areas, or the appearance of a linea nigra (a dark line running vertically on your belly). These changes are temporary and will fade after pregnancy.
  • Constipation: Hormonal changes can slow down digestion, leading to constipation. Stay hydrated, eat fiber-rich foods, and engage in regular physical activity to alleviate constipation.
  • Round ligament pain: As your uterus expands, you may experience occasional sharp pains or a stretching sensation in your lower abdomen. Changing positions slowly and practicing gentle stretching exercises can help relieve this discomfort.
  • Nasal congestion: Increased blood flow and hormonal changes can cause nasal congestion. Use saline nasal drops or a humidifier to alleviate congestion.

Tips for Week 21:

  1. Stay hydrated: Drink plenty of water throughout the day to stay hydrated and help prevent constipation.
  2. Eat small, frequent meals: Opt for smaller meals and snacks throughout the day to manage heartburn and aid digestion.
  3. Practice good posture: Maintain proper posture to alleviate backaches and improve overall comfort. Use a supportive chair or consider using a pregnancy support pillow.
  4. Communicate with your partner: Share your experiences and emotions with your partner. This can help strengthen your bond and provide support during this exciting time.
  5. Discuss maternity leave: Start having conversations with your employer or HR department about maternity leave options. Familiarize yourself with your rights and benefits, and plan accordingly.


  1. Can I dye my hair during week 21 of pregnancy?
    • While there is limited research on the safety of hair dye during pregnancy, most experts consider it safe to dye your hair after the first trimester. However, it’s recommended to opt for ammonia-free and low-chemical hair dyes and ensure proper ventilation during the process.
  2. Is it normal to have vivid dreams during week 21 of pregnancy?
    • Yes, vivid dreams are a common occurrence during pregnancy. Hormonal changes, increased brain activity, and heightened emotions can contribute to these vivid dreams. Embrace them as a normal part of the pregnancy journey.
  3. When should I start shopping for maternity clothes?
    • As your body continues to change, it’s a good idea to start shopping for maternity clothes around week 21 or whenever your regular clothes start feeling uncomfortable. Look for comfortable, stretchy fabrics that will accommodate your growing bump.

Disclaimer: Please note that our website is designed exclusively for entertainment purposes. Although we have confidence in our approach, we do not assert a specific accuracy rate since ongoing research continues to shape our methods.