That little coccygeal tail your embryo had last week? Gone. By the end of week 8, it is completely reabsorbed — and what's left is unmistakably, startlingly human. Fingers are splitting apart from paddle-shaped hand plates, a nose tip is pressing forward, and the heart is now dividing into four distinct chambers, beating at roughly 150–170 beats per minute.
🍼 What's Happening With Your Baby
Your baby has reached approximately 1.6 centimetres from crown to rump — about the size of a raspberry. The fingers are actively separating; programmed cell death (apoptosis) is carving the spaces between each digit. By the end of this week, individual fingers are distinguishable.
The embryonic tail, a vestigial remnant of early development, has now fully disappeared. The intestines are temporarily herniated into the umbilical cord (they return to the abdominal cavity around week 10–12). This is completely normal and is called physiological midgut herniation.
One thing your baby cannot do yet: move in any way you'll feel. Spontaneous movements begin around weeks 7–8 but are far too tiny and random to register.
🤰 What You're Feeling This Week
Week 8 is when morning sickness hits its peak intensity for most women. hCG (human chorionic gonadotropin) typically reaches its highest concentration between weeks 8 and 10, and hCG is the primary driver of nausea. If you feel worse this week than last, that's physiologically expected.
Food aversions are often most severe right now too. Many women find that the smells they could tolerate at weeks 5–6 become genuinely unbearable by week 8.
Emotionally, week 8 often brings a specific kind of anxiety: the wait before the first official prenatal appointment. You know something major is happening inside you, but you haven't heard a heartbeat confirmed in a clinical setting yet.
This Week's Defining Moment
Your baby's fingers are forming right now — individual digits carving themselves apart. Those tiny hands that will one day hold yours are taking shape at just 1.6 centimetres long.
✅ What To Do This Week
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Book your first prenatal appointment now — if you haven't already. Most OB-GYNs schedule the initial visit between weeks 8 and 10, and it often includes a full blood panel and a dating ultrasound.
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Manage peak nausea strategically — ask your doctor about Vitamin B6 (pyridoxine) or prescription options like doxylamine if nausea is severe.
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Avoid ibuprofen and NSAIDs entirely — week 8 is within the critical organ formation window. NSAIDs are contraindicated throughout the first trimester. Use acetaminophen only if approved by your doctor.
"You are exhausted, nauseous, and possibly running to the bathroom more than you'd like to admit — and you are doing this while building a nervous system, a four-chambered heart, and ten tiny fingers from scratch. Your body isn't failing you right now. It's working at a level most people will never understand."
— A Note From Your Body, Week 8