Week 18 of Pregnancy: A Sweet Potato, and the Week I First Felt Movement
Key takeaways
- By week 18, the baby is about 14.2cm long, roughly the size of a sweet potato, with hearing and sucking reflexes developing.
- The baby has actually been moving for a couple of months already — you just haven't been able to feel it until now.
- Quickening, the first felt movement, often shows up as a faint fluttering or bubbling sensation rather than a clear kick.
- It's completely normal for a partner to not be able to feel anything from the outside yet, even once you can feel it clearly.
- Timing varies a lot — feeling nothing yet at week 18 doesn't mean anything is wrong.
Week 17 was quiet for us. Week 18 was not — this was the week I actually felt our daughter move for the first time, and it’s stayed one of the more vivid memories of the whole pregnancy.
What’s actually happening in your body
The baby is now around 14.2cm long, about the size of a sweet potato. Hearing, feeling, swallowing, and sucking reflexes are all actively developing, and the baby has been wriggling around, moving arms and legs, for a couple of months already — you simply haven’t been able to feel any of it until now, according to NHS guidance on week 18 of pregnancy. This first felt movement, often called quickening, tends to show up as a gentle fluttering or bubbling sensation rather than anything sharp or unmistakable.
What I actually felt
I was able to feel a slight movement this week, though my husband wasn’t able to feel anything with his hands on my belly — which is completely normal, since movement usually needs to get stronger before it’s noticeable from the outside. To me, it felt like something was moving slowly inside my stomach, on and off, rather than a distinct kick. It wasn’t dramatic, but it was unmistakably new, and it was the first moment the pregnancy felt like it had a physical presence of its own rather than something I was just being told about.
If you haven’t felt anything yet, that’s completely fine too — timing genuinely varies, and first-time mothers in particular often feel it a bit later than this.
Nutrition focus this week
No changes from earlier weeks. Keep up with your prenatal vitamin and the general guidance in our foods and drinks to limit or avoid during pregnancy.
What to discuss with your doctor or midwife
If you’ve started feeling movement, it’s worth mentioning at your next appointment, just so it’s noted as part of your ongoing picture. If your partner is curious about feeling it too, it’s worth explaining that this usually takes several more weeks — it’s not a sign anything is different about your pregnancy.
Frequently asked questions
What does quickening actually feel like?
Most women describe it as a faint fluttering, bubbling, or rolling sensation — subtle enough that it’s easy to mistake for digestion the first few times.
Why can’t my partner feel anything yet, even though I can?
Movement needs to become stronger and more forceful before it’s detectable through the belly from the outside, which usually takes several more weeks after you first feel it yourself.
Is it normal to not feel anything by week 18?
Yes. Timing varies significantly, and first-time mothers especially often don’t feel clear movement until closer to week 20 or beyond. It’s not a cause for concern on its own.
Has the baby only just started moving now?
No — the baby has actually been moving for a couple of months already. Week 18 is simply around when the movements often become strong enough for you to notice.
What size is the baby at week 18?
About 14.2cm long, roughly the size of a sweet potato.
References
- NHS — Your Pregnancy and Baby Guide, Week 18. nhs.uk
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