pregnancy week 12
12 weeks pregnant.
End of the first trimester. Reflexes are kicking in — if you poke your belly, the baby will squirm in response.
Updated 29 July 2026 · Sources: NHS and ACOG
Your baby this week
Fully formed in miniature — all organs are in place, fingers and toes have nails forming, and the face has eyes, ears, and a nose.
- End of first trimester
- Reflexes develop
- Vocal cords form
- Bone marrow makes white blood cells
What may be changing in your body
Your uterus has grown out of the pelvis and you may feel it just above the pubic bone. Many people see nausea fade this week.
Nausea lifting
This is the classic turning-point week — many people notice sickness fading noticeably from here. If it lingers, weeks 14 to 16 are the next common exit point.
Energy returning
As the placenta takes over hormone production, the bone-deep fatigue starts to lift. Enjoy the change, but let your body set the pace.
Fewer loo trips, briefly
As the uterus rises out of the pelvis it takes pressure off the bladder, buying you a few months of relative peace before the third trimester reverses it.
Skin changes beginning
Darkening of the nipples, a faint line down the belly, or patches of facial pigmentation can start appearing. All are hormonal, common and fade after birth.
Mild headaches
The hormonal handover around the end of the first trimester can trigger headaches. Hydration, regular meals and rest usually settle them; a severe headache with visual changes needs a call to your midwife or doctor.
Occasional dizziness
Blood pressure remains at its pregnancy low. Keep snacks handy and avoid standing still for long stretches.
Your week 12 checklist
- Have your dating scan and combined screening if planned
- Make your announcement plan real — many people share the news after this week's scan
- Photograph or scan your ultrasound pictures so they are backed up
- Review your budget for the months ahead: maternity pay dates, baby essentials, childcare research
- Start using sunscreen daily to limit pregnancy pigmentation (melasma)
A useful partner move this week
If the scan went well, this is often announcement week — let her lead on timing and audience, including at your own workplace. Energy is returning, so plan something the two of you have shelved since the nausea began, like a proper dinner out. This is also the sensible week for you both to look at money: maternity pay, paternity or partner leave, and what the next year costs.
What comes next
Welcome to the second trimester — the easiest stretch for most. Energy lifts, nausea fades, and the belly starts showing.
Common questions
Is 12 weeks really the safe point to announce a pregnancy?
By the end of week 12, miscarriage risk has fallen to a small fraction of its early-pregnancy level, which is why it is the traditional announcement point. But there is no rule — some people tell close friends early precisely so they would have support if something went wrong, and others wait until after the 20-week scan. The right time is whenever you both feel ready.
When will I start showing?
Most first pregnancies show a definite bump between 14 and 20 weeks, while second and later pregnancies often show from 12 weeks or earlier because abdominal muscles have stretched before. Height, torso length and core strength all shift the timeline. What you see at 12 weeks is usually bloat plus a rising uterus rather than the baby itself.
Can I find out the sex at the 12-week scan?
Sometimes a sonographer can make an educated guess from the angle of the genital tubercle, but it is not reliable and most clinics will not commit to it. NIPT blood testing can report sex accurately from around 10 weeks if you have opted for it. Otherwise, the 20-week anomaly scan is the standard point to find out — if you want to.
How many months is 12 weeks pregnant?
Pregnancy months do not divide evenly into weeks, so clinicians date pregnancy in weeks. At 12 weeks, you are in trimester one.