Week 18 of Pregnancy
bell pepper

Week 18 of Pregnancy

Your baby is the size of a bell pepper

8.7 in • 7.9 oz

TrimesterSecond
Weeks left22

Baby Development

Your baby's ears are starting to stand out on the head, and they might begin to hear sounds. The digestive system has also started working. Your baby is now about 5.5 inches (140 millimeters) long from crown to rump and weighs about 7 ounces (200 grams).

Your Body This Week

Your healthcare provider may recommend an ultrasound around this time to check on your baby's growth and development. This is often when you can find out the sex of your baby, if you choose to. You may also be feeling more energetic and have a renewed sense of well-being.

Milestones This Week

Baby starts kicking

You may start feeling baby's first movements, like little butterflies in your belly!

Baby can hear sounds!

Baby's hearing is developing. They can start hearing your voice and your heartbeat.

Anatomy scan

The anatomy scan is the most detailed ultrasound of the pregnancy. It evaluates baby's development and can reveal the sex, if you wish.

Learn More

As you reach week 18 of your pregnancy, significant hormonal and physiological changes continue to support the growth of your baby and prepare your body for the upcoming months. Hormones like estrogen and progesterone are still at high levels, contributing to noticeable symptoms such as breast tenderness and swelling—common signs that your body is priming itself for lactation. Although caloric needs don't spike dramatically until later, your metabolism has become more efficient at storing energy, particularly as maternal fat, to sustain both you and your baby. Emphasizing a nutrient-dense diet rich in fruits, vegetables, whole grains, lean proteins, and healthy fats will provide essential vitamins and minerals vital for fetal development. Continue to take prenatal vitamins with folic acid for additional support. As your body adapts, maintaining moderate physical activity is crucial. Consider incorporating 30 minutes of exercises like walking, swimming, or prenatal yoga most days of the week to boost your mood, manage potential weight gain, and enhance your overall well-being. Remember to listen to your body and rest when needed, as fatigue can be persistent. These adaptations are a testament to your body’s remarkable capacity to nurture and sustain new life.

Frequently Asked Questions

How big is my baby at 18 weeks pregnant?

At week 18 of pregnancy, your baby is about the size of a bell pepper, measuring approximately 8.7 in and weighing around 7.9 oz.

What trimester is week 18 of pregnancy?

Week 18 is in the second trimester of pregnancy. The first trimester covers weeks 1-13, the second trimester covers weeks 14-26, and the third trimester covers weeks 27-40.

What is happening with my baby at week 18?

Your baby's ears are starting to stand out on the head, and they might begin to hear sounds.

What symptoms can I expect at week 18 of pregnancy?

Your healthcare provider may recommend an ultrasound around this time to check on your baby's growth and development.

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