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Sign InWeek 7 — Brain Building at Record Speed
Overall Pregnancy
Your Baby is About
blueberry
Your baby is the size of a blueberry this week — about 10mm — and the brain is going wild. Right now, your baby's brain is producing around 100 new brain cells every single minute. The five main lobes of the brain are already beginning to form, along with the cranial nerves. Arms and legs are lengthening, tiny paddle-shaped hands are forming, and eyelids are starting to develop. Your baby also has a tongue now.
By 7 weeks, every essential organ has started forming — heart, brain, liver, kidneys, lungs, stomach. This is one of the most critical development windows of the entire pregnancy, which is why avoiding alcohol, smoking, and unnecessary medications matters so much right now. Fatigue is likely intense this week — your body is running a full-scale construction operation 24/7. Rest is not laziness, it's part of the job.
By Week 7 your baby is roughly 10,000 times larger than the single cell it was at conception — and it's still only the size of a blueberry. That growth rate compresses what would be years of development in most contexts into just seven weeks. Nothing in nature grows quite like a human embryo in the first trimester.
If you haven't told your employer yet and are struggling with first trimester symptoms, you're not obligated to — but if nausea or fatigue is affecting your work, it might be worth confiding in your manager early so they can make accommodations. You don't have to share all the details, just enough so they're not confused by any changes in your routine.
Vitamin B6 has solid evidence behind it for reducing nausea — 10–25mg three times a day is the typical recommended dose. Talk to your provider before supplementing, but it's worth raising at your first appointment.
Fatigue at 7 weeks is real and significant. Taking over evening tasks — cooking, cleaning, errands — isn't just helpful, it's important for your partner's health right now.
This content is for informational purposes only and is not medical advice. Always consult your healthcare provider for guidance specific to your situation. Read full disclaimer