Pregnancy Week 13
You are reaching the end of the first trimester. Your baby is growing rapidly, facial features are becoming more defined, and the body is becoming more proportional. For many people, early pregnancy symptoms may also begin to ease.
Your Baby This Week
End of the First Trimester
At week 13, your baby has developed many of the basic structures needed for continued growth. The organs and body systems that formed during the first trimester will continue to mature throughout the rest of the pregnancy.
The body is becoming longer and more proportional, while the head gradually becomes less dominant compared with the rest of the body.
Facial Features Continue Developing
The eyes and ears are continuing to move toward their developing positions. The nose, mouth, and chin are becoming more defined, giving your baby’s face a more recognizable appearance.
Movement & Reflexes
Your baby can move the arms, legs, and body. The developing nervous system is becoming more coordinated, although you may still be unable to feel these movements.
Growing & Becoming Stronger
Your baby is about the size of a pea pod. The body is becoming more proportional as the muscles, bones, organs, and nervous system continue to develop.
Your Body This Week
As the first trimester comes to an end, you may notice some changes in how you feel.
Morning Sickness
For many people, nausea begins to improve around the end of the first trimester. However, some people may continue experiencing nausea beyond this point.
More Energy
Your energy levels may gradually improve as early pregnancy symptoms begin to ease.
Growing Belly
Your uterus continues to grow and move higher into the abdomen. You may begin noticing a more visible pregnancy bump.
Breast Changes
Your breasts may remain fuller and tender as your body continues preparing for breastfeeding.
Tips for week 13
- Continue taking your prenatal vitamin every day.
- Maintain a balanced diet with plenty of fruits and vegetables.
- Include iron-rich and protein-rich foods in your meals.
- Drink plenty of water throughout the day.
- Continue safe physical activity if your healthcare professional has approved it.
- Avoid alcohol, smoking, and recreational drugs.
- Limit caffeine to 200 mg or less per day during pregnancy.
- Get enough rest and sleep.
- Keep your prenatal appointments and recommended screenings.
- Discuss any new or concerning symptoms with your healthcare professional.
Nutrition This Week
As you approach the second trimester, your nutritional needs continue to increase as your baby grows.
Folate Rich Foods
Iron Rich Foods
Healthy Fats
Protein Rich Foods
Fruits & Vegetables
Calcium Sources
Stay Hydrated
Nutrition Tip
As your appetite returns, use this opportunity to build balanced meals rather than simply eating larger portions. Combine protein, whole grains, fruits or vegetables, and healthy fats whenever possible.
Frequently Asked Questions
How big is my baby at Week 13?
Your baby is approximately the size of a pea pod. Exact measurements can vary depending on the timing of development.
What is developing during Week 13?
Your baby’s body is becoming more proportional, while the muscles, bones, nervous system, and organs continue to develop and mature.
Can my baby move during Week 13?
Yes. Your baby can move the arms, legs, and body and may make small reflexive movements. These movements are usually still too subtle for you to feel.
Is Week 13 the second trimester?
Week 13 is commonly considered the beginning of the second trimester, although the exact boundaries of the trimesters can vary slightly between medical sources.
Should my morning sickness be getting better?
Many people notice improvement in nausea around the end of the first trimester, but it is also possible for symptoms to continue.
Will my pregnancy bump become more noticeable?
Your uterus continues growing during this period, and you may begin showing more visibly. The timing varies considerably from person to person.
Week by Week
Explore your pregnancy journey week by week.
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