Week 7
Your baby is the size of a Blueberry
Baby Size
Blueberry
Length
0.4 in (1 cm)
Weight
Less than 0.04 oz
Trimester
First Trimester
Your Baby at Week 7
At 7 weeks, your baby is the size of a blueberry. The brain is developing rapidly, with distinct hemispheres forming.
Key milestone: Hands and feet form. The brain hemispheres develop. Eyelid folds appear.
Your Symptoms
Continued nausea. Increased fatigue. Visible veins due to increased blood flow.
Tip for This Week
Start thinking about your first prenatal appointment if you haven't scheduled one.
Your Body at Week 7
During the first trimester, your body is working overtime to build the placenta and support rapid embryonic development. Hormones like hCG, estrogen, and progesterone surge, causing many of the symptoms you're experiencing. Your blood volume is already increasing, and your uterus is beginning to expand — even if you can't see it yet.
Your baby at week 7 is the size of a Blueberry, measuring about 0.4 in (1 cm) and weighing roughly Less than 0.04 oz. The focus is on forming all major organ systems that will sustain your baby through the rest of pregnancy and beyond.
Your Baby's Development This Week
At 7 weeks, your baby is the size of a blueberry. The brain is developing rapidly, with distinct hemispheres forming. The key milestone this week is that hands and feet form. the brain hemispheres develop. eyelid folds appear.
The first trimester is a period of incredible transformation. From a single cell to a fully formed fetus in just 12 weeks — your baby's development is happening at an astonishing pace. Each week brings new organs, new abilities, and new reasons to marvel at the process.
This week's voice theme
“Dreaming with eyes still closed — worlds being built.”
Imagine hearing this every morning — a voice note from your baby that evolves week by week.
Hear your baby's voice →Frequently Asked Questions
What should I expect at my first prenatal visit?
Your first visit typically includes a physical exam, blood work, urine test, and sometimes an ultrasound.
Can stress affect my baby at 7 weeks?
While everyday stress is normal, extreme stress can impact pregnancy. Practice relaxation techniques.