You have reached the 18th week of pregnancy and your bond with your baby is growing. You are looking for answers to many questions about pregnancy and baby development. What happens in the 18th week of pregnancy? How big is the baby at 18 weeks? How many grams is an 18-week baby, and how many centimeters will the baby be?

Here is the 18-week baby development as explained by Prof. Dr. Erkut Attar, Head of the Department of Obstetrics and Gynecology at Yeditepe University Hospitals and IVF Specialist...

How Big is an 18-Week Baby?

Your baby is now 14.2 cm tall and weighs 190 grams.

Baby Development at 18 Weeks of Pregnancy

Head size is small compared to body size. The auricles have settled into their final position. During these weeks, the baby is busy moving its arms and legs.  
The airways are also developing; the air-carrying tubes in your baby's lungs branch out and form smaller tubes. By the end of the second trimester, these tubes form air sacs called alveoli, which are essential for breathing. Your baby's digestive system is also starting to work.

18 Weeks Baby and Gender Development

If it is a baby girl, the uterus is formed and in place and the tubes are developing, if it is a baby boy, the penis is growing faster.

Image of a 18-19 Weeks-Old Baby

1 Question | 1 Answer about Pregnancy

• Can I have laser hair removal while pregnant?

• Laser hair removal applications can be performed during pregnancy. Laser is a technique that uses light energy. The resulting electromagnetic radiation is different from X-rays used in roentgen and cannot travel through tissue. The beam only affects the area where the procedure is performed, for example, the face, and its area of effect is limited to a few millimeters. Therefore, it cannot reach or harm the baby in the womb. However, it is still appropriate to leave such applications after 3-4 months of pregnancy.