9 Weeks Pregnant: Baby Development
By nine weeks, your baby is officially starting to look more human, having grown to around the size of a cherry. The embryo is technically about to become a foetus, marking an important developmental milestone. Here's what's changing this week.
Your baby's development this week
This is a big week for visible transformation:
- Facial features are becoming clearer, with eyelids forming (though they remain fused shut until later in pregnancy) and the outer ears taking shape on the sides of the head.
- The heart is now fully formed with four chambers, pumping blood efficiently around your baby's tiny body.
- Arms and legs are lengthening, with elbows and knees now visible, and tiny fingers and toes are separating from their earlier webbed appearance.
- Your baby is moving — small, spontaneous movements of the limbs — though at this stage the movements are far too subtle for you to feel.
By the end of this week, your baby measures around 2.2–2.3cm from crown to rump.
What's happening in your body
- Morning sickness often continues, though for many women it starts to ease from around this point into early into the second trimester, even if it doesn't feel that way yet.
- A very slight bump may be noticeable, though at nine weeks this is much more likely to be bloating than baby, as your uterus is still roughly the size of a large orange.
- Mood swings are common as hormone levels fluctuate significantly, and it's completely normal to feel tearful, irritable or unusually emotional without an obvious trigger.
- Your blood volume is steadily increasing to support the placenta and growing baby, which can contribute to tiredness and, for some, a faster resting heart rate.
Things to keep in mind this week
- Continue your daily 400mcg folic acid and 10mcg vitamin D supplements through to at least week 12 for folic acid.
- If you haven't yet contacted a GP or midwife to arrange your booking appointment, this is a good time to do so, as booking appointments typically happen between 8 and 12 weeks.
- Gentle movement, such as short walks, can help with energy levels and mood, provided you feel well enough.
- Contact your midwife or GP if you experience heavy bleeding, severe abdominal pain, or vomiting so severe you can't keep fluids down.
Frequently Asked Questions
When can I feel my baby move?
Most women don't feel movement until around 16 to 24 weeks, with first-time mothers often noticing it later than those who've been pregnant before. At nine weeks, your baby is moving inside the womb, but is still far too small and the movements far too gentle for you to detect them yet. What you might notice around this time is more likely gas, bloating, or your uterus adjusting rather than foetal movement.
What's happening at 9 weeks pregnant?
Your baby is starting to look distinctly human this week, with facial features forming, a four-chambered heart now complete, and limbs lengthening with visible elbows and knees. Meanwhile you may still be managing morning sickness and fatigue, though many women find symptoms begin to ease over the coming weeks as they move toward the second trimester.
Is it normal to not have a bump yet at 9 weeks?
Yes, completely normal — most women don't show a proper bump until well into the second trimester, often between 12 and 16 weeks or later. Any visible change at nine weeks is far more likely to be bloating than your growing baby, and the timing of when a bump appears varies enormously between individuals and pregnancies.
This article is for informational purposes only and does not constitute medical advice.
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