Week 12 of Pregnancy
First 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 plum
2.1 inches · 0.5 oz
Baby this week
- •Fingernails and toenails are forming
- •Hair follicles are developing on the scalp
- •Baby can make a fist and may be sucking their thumb
- •Tooth buds are forming beneath the gums
- •Baby's heartbeat can be heard with a Doppler at your appointment
You this week
- •Nausea may finally start to ease for many people
- •Breast tenderness and swelling continuing
- •Possible constipation and bloating
- •Fatigue, though energy may start improving
- •Increased appetite as nausea subsides
- •Mild headaches
This week's tips
- •Schedule your first trimester screening ultrasound if you haven't already—this is the ideal week for it
- •Start thinking about when you want to tell people your news; there's no 'right' time, only what feels right for you
- •Begin a gentle prenatal exercise routine if you haven't started—walking, swimming, or prenatal yoga are all great options
- •Focus on nutrition now that food might be more appealing; prioritize protein, iron-rich foods, and leafy greens
- •Stay hydrated and continue taking your prenatal vitamins
Informational only — always check with your doctor or midwife for advice specific to you and your baby.
Looking ahead
You're approaching the end of your first trimester—a major milestone! Many people feel a shift in energy and confidence as you move into the second trimester, often called the "honeymoon phase" of pregnancy.
Track your pregnancy on BringBaby
Join free to track your pregnancy week-by-week and find baby-friendly places to visit as baby grows.
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.
More free tools
Looking for places to bring baby?
Explore BringBaby