They are nauseas and/or dizzy.
Their belly gets bigger and bigger... a baby is growing in there!
They are very tired: the body is using a lot of energy to help the baby to grow.

An ultrasound lets us see the baby inside their mom's belly and listen to the baby's heartbeat!

Rest a lot and take vitamins that have iron.
Eat healthy foods, because nutrients are given to the baby through the umbilical cord (a tube that connects a mother to her baby).