Week 18 of Pregnancy
Second trimester
For informational purposes only. This page is not medical advice. Every pregnancy is different — always consult your doctor, midwife, or healthcare provider for guidance specific to your situation. In an emergency, call your provider or 911 immediately.
Baby is
about the size of a bell pepper
5.5 inches · 5.3 oz
Baby this week
- •Can now hear sounds from outside the womb, including your voice
- •Vernix caseosa (protective waxy coating) is beginning to form on skin
- •Ears are in their final position and fully formed
- •Developing a sleep-wake cycle and may be most active when you're resting
You this week
- •Quickening sensations becoming stronger and more recognizable
- •Lower back pain as your center of gravity shifts
- •Increased appetite and cravings
- •Occasional dizziness or lightheadedness
- •Linea nigra (dark line on abdomen) may become visible
This week's tips
- •Start talking to your baby regularly—they can hear you now and may respond to familiar voices after birth
- •Practice good posture and consider prenatal yoga or stretching to manage back pain
- •Schedule your anatomy ultrasound if you haven't already—this is often the detailed scan around weeks 18-22
- •Stay hydrated and eat regular, balanced meals to manage energy dips
- •Consider starting to research birthing classes and healthcare providers for labor support
Informational only — always check with your doctor or midwife for advice specific to you and your baby.
Looking ahead
Your anatomy ultrasound is likely coming up soon, where you'll get a detailed look at your baby's development and can find out the baby's sex if you wish. Many people find this scan incredibly reassuring and emotional—it's a real moment of connection.
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For informational purposes only. This page is not medical advice. Every pregnancy is different — always consult your doctor, midwife, or healthcare provider for guidance specific to your situation. In an emergency, call your provider or 911 immediately.
This content is for informational purposes only and is not medical advice. Every pregnancy and baby is different. Always consult your doctor, midwife, or pediatrician for guidance specific to your situation.
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