← Back to All Weeks
🌱First Trimester•Weeks 1-13
Week 13 of Pregnancy
Your baby is the size of peapod
📏
Length
2.9 inches
⚖️
Weight
0.81 ounces
🍎
Size Comparison
Peapod
👶 Baby Development
- •Unique fingerprints are forming on tiny fingertips
- •Eyes are moving closer together from the sides of the head to the front of the face
- •Baby can suck their thumb and has developed the sucking reflex
- •Ovaries (with 2 million eggs) or testes are fully developed internally
- •Vocal cords are complete and fully formed
- •Intestines finish moving from umbilical cord into abdomen
- •Baby can make complex facial movements including smiling and frowning
💭 Common Symptoms
- •Energy levels increase significantly as you enter the second trimester
- •Morning sickness usually subsides or disappears completely for most women
- •Baby bump becomes more visible and noticeable to others
- •Round ligament pain may increase as ligaments stretch rapidly
- •Sex drive may return as energy improves and nausea fades
- •Continued breast growth and possible leaking of colostrum
- •Improved emotional well-being as first trimester challenges ease
🥗 Nutrition Tips
- •Continue balanced nutrition with a variety of colorful fruits and vegetables
- •Eat at least 5 servings of fruits and vegetables daily for vitamins, minerals, and fiber
- •Include healthy fats from avocados, nuts, seeds, olive oil, and fatty fish for brain development
- •Stay hydrated with 10-12 glasses of water daily
- •Increase protein intake to support rapid fetal growth
- •Include foods rich in DHA (salmon, sardines, walnuts) for brain and eye development
- •Continue prenatal vitamins daily without skipping doses
✅ To-Do This Week
- •Celebrate completing the first trimester - a major milestone!
- •Schedule your second trimester prenatal visits (typically every 4 weeks)
- •Go maternity clothes shopping for comfortable, growing belly accommodations
- •Start researching baby gear like cribs, strollers, and car seats
- •Book your 20-week anatomy scan appointment
- •Consider revealing baby's gender if you did early genetic testing
- •Start thinking about baby names if you haven't already
- •Take progress photos to document your changing body
💡
Did You Know?
Congratulations on completing your first trimester! The risk of miscarriage drops dramatically after 13 weeks - from about 15% in early pregnancy to just 1-2% from now until delivery. This is a major milestone to celebrate!