21st Week of Pregnancy – Development and Experiences in 21 Weeks of Pregnancy


Changes in the Mother at 21 Weeks of Pregnancy: 21 Weeks Pregnancy Baby Development

As a mother, experiencing the changes in your body during pregnancy can be a journey full of surprises. At 21 weeks, you have made it to the halfway point of pregnancy, and you may have already noticed some significant changes. In this article, we will explore the changes that occur in a mother’s body during the 21st week of pregnancy, as well as the development of the baby at this stage.

Understanding the 21st Week of Pregnancy

At 21 weeks, you are entering the second half of your pregnancy. This means you are almost five months pregnant, and the baby is growing rapidly. By this time, you may have already started feeling the baby’s movements, and you may be experiencing some common pregnancy symptoms such as fatigue, constipation, and back pain.

How Many Months Is the 21st Week of Pregnancy?

The 21st week of pregnancy is about 4 and a half months into the pregnancy. Typically, pregnancy is divided into three trimesters, with each trimester lasting around 12 to 13 weeks. By the 21st week, you are already into the second trimester, which spans from week 13 to week 28.

Changes in the Mother at 21 Weeks of Pregnancy

Weight Gain

By the 21st week, you should have gained around 10 to 15 pounds, depending on your pre-pregnancy weight. This weight gain is essential for the baby’s healthy development, but it can also be challenging for some mothers who may feel uncomfortable with their changing bodies.

Skin Changes

Due to the increased production of hormones during pregnancy, you may notice changes in your skin. Some women experience acne, while others develop a dark line on their bellies called linea nigra. You may also notice changes in your skin’s texture and sensitivity.

Braxton Hicks Contractions

Braxton Hicks contractions are a type of practice contraction that your body may experience during the second half of pregnancy. These contractions may feel like mild menstrual cramps and are usually not a cause for concern. However, if you experience any severe or regular contractions, it’s essential to speak to your healthcare provider.

Back Pain

As your belly grows, the added weight can cause strain on your back muscles, leading to back pain. It’s essential to practice good posture, avoid lifting heavy objects, and use a pregnancy pillow to support your back and belly while sleeping.

21 Weeks Pregnancy Baby Development

At 21 weeks, the baby is approximately the size of a carrot, measuring around 10.5 inches long and weighing around 12.7 ounces. Here are some significant developments that occur in the baby at this stage:


By the 21st week, the baby’s movements become more pronounced, and you may feel more kicks and punches. The baby can also sense light and dark, and you may notice the baby’s movements increase when you are in a bright environment.

Digestive System

The baby’s digestive system is developing rapidly, and the baby can swallow and digest amniotic fluid. The baby’s taste buds are also developing, and the baby may be able to taste the different flavors of the amniotic fluid.

Ear Development

The baby’s ears are now fully formed, and the baby can hear sounds both inside and outside the womb. Talking or singing to the baby may help to establish a bond between the mother and baby.

Fetal Movement Monitoring

During the 21st week, your healthcare provider may recommend monitoring the baby’s movements regularly. This monitoring helps to ensure that the baby is healthy and developing correctly.


At 21 weeks, both the mother and baby are going through significant changes. As a mother, it’s essential to take care of yourself and monitor any changes in your body. Regular prenatal care is also crucial to ensure that your baby is healthy and developing correctly. By understanding the changes that occur in the mother and baby at 21 weeks, you can better prepare for the rest of your pregnancy.


  1. Can I still exercise at 21 weeks pregnant? Yes, regular exercise is beneficial for both the mother and baby during pregnancy. However, it’s important to talk to your healthcare provider before starting any exercise routine.
  2. What foods should I avoid during pregnancy? Certain foods such as raw or undercooked meat, fish with high levels of mercury, and unpasteurized dairy products should be avoided during pregnancy. It’s essential to talk to your healthcare provider about a healthy diet during pregnancy.
  3. Is it normal to feel anxious during pregnancy? Yes, it’s normal to feel anxious during pregnancy, but if the anxiety becomes overwhelming, it’s essential to talk to your healthcare provider.
  4. Can stress affect my baby during pregnancy? Yes, high levels of stress during pregnancy can have negative effects on the baby’s development. It’s important to find ways to manage stress during pregnancy.
  5. When should I start preparing for childbirth? It’s never too early to start preparing for childbirth. Talk to your healthcare provider about childbirth education classes and other resources available to help you prepare.
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