8 Weeks Pregnant: The Week Your Baby Starts to Move

Last week, your baby's brain came alive. This week, the body it will one day command starts to move.

Week eight is your baby's last week as an embryo, and it goes out with something extraordinary. Somewhere in the quiet of these few days, for the very first time, your baby moves. A twitch. A stretch. A tiny ripple through a body barely longer than your thumbnail. You will not feel a thing, not for months yet. But it is happening, right now, in the dark. Let me show you.

Your baby is already moving

By the end of this week, something quietly miraculous happens. Your baby's spinal cord and nerves become wired up just enough, and your baby begins to move.

Not because it decides to. The brain is nowhere near ready to give orders yet. These first movements bubble up from the spine and the nerves all on their own. Little spontaneous twitches and stretches and curls, a new arm bending, the flicker of a not-quite hand. Your baby is, in the most literal sense, trying itself out for the very first time.

And here is the part that catches in my throat. All of this is happening, this week, inside you. Your baby is moving right now, as you read this. But it is still so small, and there is still so much room, that you will not feel a single flutter of it for many weeks yet, often not until somewhere around sixteen to twenty weeks. So for now, it is a secret kept even from you. Your baby, turning and stretching in the warm dark, while you sit here with no way yet to feel the dance that has already begun.

Fingers, toes, and a sculptor made of cells

Look at your baby's hands this week and you would see something like tiny paddles, the fingers still joined together by little webs of skin.

Now here is how those fingers come free, and it is not at all what you would expect. They do not grow apart. Instead, the cells in the webbing between them are quietly instructed to clear away, melting back so that each finger is left standing on its own. Your baby is being shaped not only by what is added, but by what is carefully taken away. Like a sculptor freeing a hand from a block of stone by removing everything that is not the hand. Over this week and the next, ten fingers and ten toes are carved free, one tiny space at a time.

A face that is becoming a face

Up top, your baby's face is arriving, piece by piece.

The eyes, which began as dark spots out on the sides of the head, are deepening with pigment and slowly edging toward the front. Eyelids are starting to grow over them. The little shell-shaped beginnings of ears are budding. An upper lip appears. The tip of a nose. And the whole body, curled tight like a comma all this time, begins to straighten and uncurl. Your baby is starting, unmistakably, to look like your baby.

The last week as an embryo

This is a milestone week, even if it passes in complete silence.

For the past five weeks, your baby has been an embryo, deep in the great building phase, laying down a brain, a heart, a spine, the first version of every organ it will ever own. By the end of this week, that astonishing architecture is in place. The beginnings of everything are there.

And so your baby is about to be given a new name. From next week, it is no longer an embryo. It is a fetus. The building is largely done. Now comes the growing.

How big is my baby at 8 weeks?

Around a centimetre and a half now, measured from head to bottom, no longer than your thumbnail. Roughly half of that is head, because the brain is still racing ahead of everything else.

Small enough to stay your secret a little longer. Big enough to have fingers, a face, a heartbeat, and the first moves of a whole lifetime.

Is it normal to feel awful right now? Or nothing?

Both, still, and truly.

Around eight weeks, the nausea and the exhaustion can be at their most demanding. Food smells turn on you. Some women are wiped out by lunchtime. Others feel queasy at all hours, never just the morning. None of it, hard as it is, means anything is wrong. And if you are sailing through feeling well, that is every bit as normal and not a thing to fret about. Bodies simply do this differently.

From Courtney. There is something strange and tender about this week. Your baby has only just started to move, is turning and stretching inside you this very day, and yet you cannot feel any of it, and you may not have told a single soul that any of this is happening. You might be carrying a secret and a sick stomach all at once, smiling through a meeting with a stash of crackers in your bag. I just want you to know that I see how much you are quietly holding. The fact that no one can tell does not make it small. Something enormous is underway, and right now you are the only one carrying it. Be tender with yourself this week. You are doing so much more than it looks.

The one thing to do this week

Keep your folate going, or start it today if you have not yet. No guilt either way.

Beyond that, your real job this week is to get through it as gently as you can. If the sickness is biting, eat what you can keep down, rest without apologising for it, and lean on whoever already knows. And if you have not yet booked your first scan or midwife appointment, it often falls somewhere in the next few weeks, so it is a good time to get it into the diary.

Coming up in week nine

Next week, your baby earns its new name. Officially a fetus now, that last little tail finally gone, the face settling into place, and the first tiny tooth buds forming in the gums, ready for a smile that is still years away.

Week nine is also, for many women, the week the nausea reaches its peak. So next week I will share the one small trick that helped me most through the worst of it. I will see you there.

Written by Courtney Garland, NICU nurse, lactation consultant and mother of four, and founder of The Mama Years. This is here to inform and reassure you. It is not a substitute for medical advice, so always follow the guidance of your own doctor or midwife.

The Mama Years. 2026.

References

Cleveland Clinic. (2023). Fetal development: Stages of growth. https://my.clevelandclinic.org/health/articles/7247-fetal-development-stages-of-growth

Mayo Clinic. (2025). Fetal development: The first trimester. https://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week/in-depth/prenatal-care/art-20045302

Merck Manual. (2024). Stages of fetal development (Consumer Version). https://www.merckmanuals.com/home/women-s-health-issues/normal-pregnancy/stages-of-fetal-development

The Mama Years is written by Courtney Garland, a NICU registered nurse and IBCLC lactation consultant, against the research. When the science is genuinely unsettled, she says so instead of guessing. Nothing here replaces the advice of the clinician looking after you.