Baby Size
Week 18

Your Baby is the Size of a Sweet Potato

Week 18

Sweet Potato

Length

14.2 cm / 5.6 in

Weight

190 g / 6.7 oz

Your baby is developing a protective coating called vernix caseosa on the skin, which shields it from the amniotic fluid.

Development at Week 18

At 18 weeks, the ears are fully formed and your baby can now hear sounds from outside the womb, including your heartbeat and voice. The digestive system is practicing contractions, and your baby is swallowing amniotic fluid regularly. This is often the week when the anatomy scan ultrasound is performed, offering a detailed look at all major structures.

Next week

At week 19, your baby will be the size of a Mango.
See Week 19

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