Last week your baby began to move — invisibly, imperceptibly, but genuinely. This week brings something even more quietly extraordinary: fingerprints. The unique ridge patterns forming on the skin of the fingertips this week are completely your baby's own, determined by a combination of genetics and the precise pressures of foetal development in the amniotic fluid. They will not change. The fingerprints forming right now will be the same ones that leave marks on windows, sign documents, and unlock phones for the rest of your child's life.
The foetus has grown to around 31mm — a strawberry — and has quadrupled in weight since last week to 4g. The body proportions are beginning to shift: the head is still large relative to the body, but the limbs are elongating and the torso is growing more rapidly. The foetus can now bend its arms at the elbows. The fingers are fully separated. Tiny tooth buds are forming beneath the gum line, even at this stage.
The critical period of organ formation — the embryonic stage — is now essentially complete. The risk of structural abnormalities caused by external factors (certain medications, infections, alcohol, radiation) was highest in the weeks 5–10 window, when organs were actively forming. From this point, the primary developmental work shifts from formation to growth. This is one of the reasons the risk profile of pregnancy changes meaningfully as the first trimester concludes.
Someone told me about the fingerprints forming at ten weeks and I sat with that for a long time. This completely specific person, already. Already fingerprints. It was the thing that made me feel, for the first time, that there was somebody in there — not just a pregnancy, but a somebody.
Week 10 is, for many people, the week where first trimester symptoms feel most entrenched. The easing described last week — possible but not guaranteed — may not have arrived yet. The nausea, fatigue, and all their companions continue, and there is a particular emotional quality to this week that is worth naming: you can now see the 12-week mark from here, and yet it still feels impossibly far away when you are in the middle of it.
The physical changes from the preceding weeks continue their gradual progression. The uterus is now roughly the size of an orange and has begun to rise above the pelvic cavity, though it is still not visible externally for most people. The increased blood volume — now well established — continues to affect everything from circulation to complexion. Some people notice their skin changing this week: either a glow from increased blood flow, or breakouts from the hormonal environment. Both are entirely normal and usually resolve as the trimester ends.
Visible veins — the blue veins on your breasts, abdomen, and sometimes legs become more prominent as blood volume increases. This is normal and expected.
Linea nigra — some people begin to notice a faint darkening of the vertical line down the centre of the abdomen this week. This is caused by pregnancy hormones stimulating melanin production. It typically darkens further in the second trimester and fades after birth.
If symptoms have not eased yet, hold this: the physiological mechanism for improvement — the placental shift described last week — is now well underway. The majority of people who are still experiencing significant nausea at week 10 will notice meaningful improvement within the next two to three weeks. Week 10 is hard. It is very close to the end of the hard part.
There is a specific quality to the emotional experience of week 10 that is difficult to describe but instantly recognisable to anyone who has been through it: the feeling of being almost there but not quite. The 12-week scan — the milestone that most people have been counting toward since they found out — is two weeks away. Two weeks feels at once very close and absolutely endless when you are in the middle of it.
The anticipation of the scan carries its own emotional complexity. For most people it is weighted with hope — the expectation of reassurance, of seeing the baby, of finally being able to tell people. But it is also weighted with anxiety, because a scan is a moment of finding out, and not everyone finds out what they hoped. The weeks immediately before the first scan often feel more acutely anxious than the weeks before, because the proximity makes the stakes feel higher.
The two weeks between ten and twelve felt longer than the six weeks before them combined. I was so close. I couldn't stop myself running through every possible outcome of the scan. My partner kept saying it would be fine and I kept thinking: you can't know that. Which was true. But the scan was fine. And the waiting did end.
If you have had a previous miscarriage, week 10 can feel particularly loaded — you are approaching the point where the previous pregnancy ended, or the point where you received difficult news. This is a recognised and very common experience. It does not need to be reasoned away. If it is becoming overwhelming, speaking to your GP or midwife about additional support — including referral to a specialist early pregnancy unit for extra monitoring — is entirely appropriate.
And if you are simply exhausted and ready for the first trimester to end: that is valid too. You are nearly there.
The themes of week 10 connect to these full topic guides.
The pattern of support from the last several weeks continues to be what is needed — but week 10 has a specific emotional quality that is worth attending to. The proximity of the 12-week scan means that anxiety often sharpens rather than eases this week. Your partner may seem more withdrawn, more preoccupied, or more fragile than in the weeks before, even as the physical symptoms may be beginning to ease. The two things are not contradictions: the physical and emotional tides don't necessarily move in the same direction.
For partners, week 10 often marks a shift in engagement. The approaching scan — frequently the first visible, external confirmation of the pregnancy for partners — can be a moment of significant emotional arrival. Many partners describe the 12-week scan as the point at which the pregnancy became real to them in a way that no amount of positive tests and nausea could fully convey. Anticipating that, and being present for it, matters.
- Make sure the scan is booked and you know where and when it is. The logistics of the scan are easy to let drift in a busy period. Confirm the date, note the hospital or clinic location, and plan to attend together if at all possible.
- Talk about what you want to happen at the scan. Do you want to find out if you're having twins? Do you want to be asked about combined screening before the appointment or is it better to discuss at the scan? Do you want to take photos? Simple conversations beforehand mean you're not making decisions in the moment under pressure.
- The anxiety your partner is feeling is not irrational. The scan can bring difficult news. Acknowledging that reality — rather than reflexively reassuring that everything will be fine — is more honest and often more genuinely comforting. "I hope it goes well and I'll be there whatever" is more truthful than "it'll definitely be fine."
Decide about combined screening — before the scan appointment. The 12-week scan is also the window for combined screening for Down's syndrome, Edwards' syndrome, and Patau's syndrome. You will be asked at the appointment whether you want this screening. The decision requires some thought, and making it in advance — rather than in the middle of a scan room — is considerably less stressful.
Most people who receive a high-probability result do not go on to receive a diagnosis. But a high-probability result does begin a process of further testing and decision-making that is emotionally significant, and it is worth knowing in advance that this is a possible outcome and thinking about how you feel about it. Some people choose not to screen because they would not act on the result regardless; others screen precisely because they would want to know. Neither choice is wrong. The important thing is that it is a choice, not a default.
In the run-up to the 12-week scan, this is the question worth having a clear answer to:
Understanding the process in advance reduces the anxiety of the appointment itself. Knowing what the sonographer is looking at, what the different measurements mean, what a higher-probability result actually involves, and what the next steps would be — all of this allows you to be present in the room rather than spending the appointment processing information that could have been understood beforehand.