26 weeks pregnant

How big is your baby at 26 weeks?

About the size of a cucumber — around 35.6 cm (14 in) long head to heel, according to the NHS, weighing roughly 902 g (about 2 lb).

On the WHO median your baby has nearly tripled in weight since 20 weeks, and will gain roughly another 600 g by 30 weeks. From here weight climbs faster than length.

A note on the numbers: from week 20 the NHS measures head to heel, not head to bottom. Weights here are the median of the WHO fetal growth charts — half of babies weigh more, half less, and a scan estimate can be out by 10 to 15 per cent either way. A number below the median is not a diagnosis.

What's developing this week

The eyes open. They have been fused shut since around week 10, and this week the lids part and blinking begins. The NHS uses that to knock down a myth: it is not true that all babies are born with blue eyes. Colour depends on the parents' genetics, brown is very common, and the shade can keep changing into adulthood, usually settling by about age three.

Sleep and wake cycles are now well established, which is why movements come in bursts with quiet gaps.

What you might feel

Leg cramps, particularly at night. The NHS suggests foot and ankle exercises, pulling your toes upwards, or rubbing the muscle where it hurts.

Forgetfulness, sometimes called baby brain, is widely reported. The NHS is careful to say it is not a medical condition or a proven phenomenon, and that tiredness and having a great deal on your mind explain most of it.

How much should your baby be moving?

This is the question the internet answers worst, so here is what the guidance actually says.

The NHS: "You do not need to count the number of kicks or movements you feel each day." There is no set number, every baby is different, and the important thing is knowing your own baby's usual pattern from day to day.

The RCOG: there is not enough evidence to recommend the routine use of a movement chart. Its Green-top Guideline 57 on reduced fetal movements is now in its second edition, reviewed on 29 April 2026, and the college notes openly that many of its recommendations are graded lower because of the state of the evidence. What is not in doubt is the action: report any reduction or change immediately.

ACOG describes something different. In the US, fetal movement counting — kick counts — is a test a clinician may ask you to do at home if you have already noticed movements less often than you think normal, with the method and the reporting threshold set by them. It is prescribed after a concern, not issued to everyone.

So: if your own doctor or midwife has given you a counting method, use theirs. And reaching a number never cancels a worry — Tommy's notes that in around half of stillbirths the mother had noticed reduced movements beforehand. Our kick counter exists to help you describe a pattern to a midwife, not to grade your baby.

Between 24 and 28 weeks, the RCOG says reporting reduced movements should get you a heartbeat check and a full antenatal check-up including uterus size, blood pressure and urine, with a growth scan if your bump measures small.

Is 26 weeks pregnant 6 months?

Yes — week 26 is the fourth week of month 6.

There is no official weeks-to-months map. A calendar month averages about 4.3 weeks, not 4, so 40 weeks is a little over nine months, and two apps can disagree. The most widely used mapping:

• Month 1 — weeks 1 to 4
• Month 2 — weeks 5 to 8
• Month 3 — weeks 9 to 13
• Month 4 — weeks 14 to 17
• Month 5 — weeks 18 to 22
• Month 6 — weeks 23 to 27
• Month 7 — weeks 28 to 31
• Month 8 — weeks 32 to 35
• Month 9 — weeks 36 to 40

Your maternity team will not use months. Everything is booked by week and day — "26 weeks and 3 days" — because a few days change what is offered.

What's happening at your appointments around now

There is no routine UK appointment at 26 weeks. If this is your first baby you were seen at 25 weeks; otherwise the next is 28 weeks, and it is a substantial one.

Two things may land in this gap. Gestational diabetes testing runs to 28 weeks in the UK and the US, and RANZCOG puts routine screening at 26 to 28 weeks. And whooping cough vaccination is still open: the NHS offers it from 16 weeks, usually around 20, and asks for it before 32 weeks so antibodies have time to cross the placenta.

If you are being tested for anything this fortnight and have not heard, chase it. Windows close.

Is it safe to fly at 26 weeks pregnant?

Yes, in a straightforward pregnancy, and you are still inside ACOG's recommended 14 to 28 week window. The RCOG is unambiguous that occasional air travel is not harmful in an uncomplicated pregnancy.

Keep two things apart. The medical position is the RCOG's: the safest time to fly is before 37 weeks with one baby and before 32 weeks with uncomplicated twins, because from those points labour becomes likely. The airline position is a commercial rule — most carriers refuse you after 37 weeks, some set an earlier limit, and from 28 weeks most want a letter from your midwife or doctor, which the NHS warns can cost money and take weeks. An airline rule is not medical advice.

The risk that is real: blood clots

ACOG puts it plainly: any travel of four hours or more — car, train, bus or plane — doubles DVT risk, and pregnancy adds to that. Under four hours the RCOG says you are unlikely to need special measures. Over four hours:

• Loose clothing, an aisle seat, regular walks about the cabin
• In-seat exercises roughly every 30 minutes, and water steadily
• Graduated compression stockings sized for you by a midwife or doctor — ACOG warns that stockings which are too tight or worn wrongly increase the risk instead

Practical points

• Two weeks until 28. If you are flying after that, ask for the letter at your 28-week appointment rather than by phone afterwards.
• Check what maternity and neonatal care exists at your destination, and carry your maternity notes.
• Tell your insurer you are pregnant. The NHS says cover should include care in labour, premature birth and the cost of changing your return date.
• Travel to Zika areas is not recommended; some travel vaccines and anti-malarials are unsuitable.

When to call your midwife or doctor

Maternity units are staffed 24 hours a day, and away from home you can walk into any of them.

Get emergency help now

Call your local emergency number (999 in the UK and Ireland, 911 in the US and Canada, 000 in Australia, 111 in New Zealand) or go to an emergency department if you have:

• Heavy vaginal bleeding, or bleeding with severe abdominal pain
• Abdominal pain you cannot concentrate through
• Fainting or collapse, chest pain, or sudden breathlessness
• A severe headache painkillers do not touch, blurred vision or flashing lights, pain below your ribs, vomiting, or sudden swelling of your face, hands or feet — NHS and ACOG both list these as pre-eclampsia symptoms needing immediate assessment
• Pain, swelling or heat in one calf or thigh, which can be a DVT

Call your midwife or maternity unit today, whatever the hour

• Any reduction, weakening or change in your baby's usual pattern of movements. Call immediately, not in the morning, and do not use a home doppler — hearing a heartbeat does not mean your baby is well
• Regular tightenings, period-type pains, or backache that is not usual for you — the NHS list for possible premature labour, meaning labour before 37 weeks, which affects about 8 in every 100 babies
• A gush or a trickle of fluid, which could be your waters breaking
• Any vaginal bleeding, however light
• Itching without a rash, especially at night or on your palms and soles — it can be intrahepatic cholestasis of pregnancy
• A temperature, feeling generally unwell, or burning when you pee

You do not need to be certain something is wrong. That is what the number is for.