§second trimester · week 18 of 40
you're 18 weeks pregnant.
last revised · baby is about 14.2 cm (5.6") · 190 g (6.7 oz)
about the size of a pomelo.
The baby is twisting, stretching, and yawning. The reproductive system is fully formed and detectable on ultrasound.
this week's highlights
- Yawning and stretching
- Reproductive system formed
- Myelin coats nerves
- Ear bones harden
how your baby looks
Limbs are graceful and elongated. Skin is still wrinkly because there's no fat yet, but eyebrows and head hair are filling in.
body in focus
- head
- Ear bones harden — hearing is improving fast.
- body
- Myelin sheaths begin coating nerves to speed signals.
- hands
- Tiny hands can grip and pat at the umbilical cord.
- feet
- Kicks are stronger and increasingly noticeable.
what's happening in your body
Many feel quickening now — distinct little flutters or kicks. Round-ligament twinges and lower-back ache are common as the bump grows.
gentle tips
- Note the first kick you feel — a memorable moment.
- Drink water before standing up — dizziness is common.
- Get your blood pressure checked at your next visit.
- Pelvic-floor exercises help support the growing uterus.
- Discuss any unusual swelling or headaches with your provider.
what to expect next
The anatomy scan is usually scheduled now or just after. You may also start feeling stronger kicks each day.