You'll have an ultrasound at 18 to 22 weeks to check on your baby's health and monitor medical complications.
These classes tell you what to expect during labor and teach techniques to help you relax and cope with the pain.
Eating a healthy snack every three hours will keep your blood sugar level so you're less likely to be starving at dinnertime.
You're in your fifth month
Baby development at 18 weeks
Ears in place
Your baby's ears are now in their final position, although they're still standing out from his head a bit.
Lungs branching out
In the lungs, the smallest tubes (bronchioles) start to develop at the tips of the branches. At the end of these tiny tubes, respiratory sacs begin to appear. By the time your baby is born, these sacs will become enmeshed with tiny blood vessels and allow oxygenated blood to circulate to all of the body's organs and tissues.
Girl and boy parts
If you're having a girl, her uterus and fallopian tubes are formed and in place. If you're having a boy, his genitals are noticeable now, but he may hide them from you during an ultrasound.
Your baby at 18 weeksTap the plus for more details
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Your baby is about the size of a bell pepper
head to bottom
Pregnancy symptoms during week 18
Hungry? An increase in appetite – and specific food cravings – are pretty common about now.
Your cardiovascular system is undergoing dramatic changes, and during this trimester your blood pressure will probably be lower than usual. Don't spring up too fast from a lying or sitting position, or you might feel a little dizzy.
Don't see your symptom?
Wondering about a symptom you have? Find it on our pregnancy symptoms page.
Your body at 18 weeksTap the plus for more details
Pregnancy checklist at 18 weeks pregnant
Think about your maternity leave
It's not too early to look into what you need to do to prepare for maternity leave. Find out what benefits you're eligible for and fill out all the paperwork you can in advance.
Prepare your older children
If you already have a child, the new baby may rock their world even more than yours. Fortunately, there are things you can do to help set the stage for a new brother or sister.
Learn the best way to buckle up
It's extra important to wear your seat belt during pregnancy – and to buckle up the right way. Secure the lap portion low under your belly and snug across your hip bones, and position the shoulder harness snugly between your breasts and off to the side of your belly.