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Baby development this week
At 26 weeks pregnant, your baby’s lungs are continuing important early development. Tiny air sacs called alveoli are forming, and the lungs are beginning to produce surfactant, a substance that helps these air sacs open and stay open after birth.
Your baby is also making practice breathing movements. They are not breathing air yet, but these rhythmic movements help stimulate lung development. Oxygen still comes through the placenta and umbilical cord.
Your baby’s skin is still wrinkled and may look pink or red because tiny blood vessels are visible beneath the surface. Over the coming weeks, your baby will gain more fat, which will gradually make the skin look smoother and less transparent.
By now, eyebrows and eyelashes are usually present. Your baby’s eyes are developed, although they may stay closed for a little longer. Fingernails are also becoming more noticeable.
What's happening to your body
At 26 weeks pregnant, pigmentation changes can become more noticeable. If you have darker patches on your face, a linea nigra on your bump, or darker freckles, moles or areolas, sun exposure can make these changes stronger.
Use a broad-spectrum facial sunscreen, wear a hat in strong sun, and avoid deliberately tanning. Pigmentation often fades after pregnancy, but protecting your skin now can stop it becoming more obvious or lasting longer.
Your own nails may be changing too. Some people find pregnancy makes their nails grow faster and feel stronger, while others find they split or become more brittle. Both can happen.
Blood pressure monitoring is important from this point in pregnancy. Pre-eclampsia can develop after 20 weeks and may not cause obvious symptoms at first, which is why regular antenatal blood pressure and urine checks matter. Early signs include high blood pressure and protein in the urine, which are usually detected at routine appointments.
Get urgent advice if you have a severe headache that does not go away, changes in vision, pain below the ribs, vomiting, sudden swelling of your face, hands or feet, heartburn that does not improve with medicine, or you feel very unwell.
How you might be feeling
Week 26 can feel like a turning point. Your baby is bigger, movements may be clearer, and the third trimester is coming into view.
That can make pregnancy feel more purposeful. It can also make the practical side feel harder to ignore: appointments, work plans, maternity leave, money, sleep, birth preferences and what you actually need before the baby arrives.
This is a good week to shift from vague planning to small, useful decisions. Not “sort the entire baby’s life”, but: check your next appointment, note questions, review work dates, look at what you already have, and decide what really needs doing next.
If your body feels more awkward now, take that seriously. Adjust your routines before discomfort becomes normal. Pregnancy is much easier when you make small changes early rather than waiting until your back, feet and sleep all lodge formal complaints.
Things to think about this week
This week, focus on prevention and preparation. Make sure you attend routine antenatal appointments, even if you feel well. Blood pressure and urine checks are quick, but they are one of the main ways pre-eclampsia is picked up early.
Preparation that may help:
- use sunscreen daily if pigmentation is appearing
- check changing moles with a GP, especially if they bleed, itch, change shape or look uneven
- keep a note of headaches, swelling, visual changes or pain high in your tummy
- review your maternity leave dates or work plans
- ask your midwife what symptoms should prompt an immediate call
- keep learning your baby’s usual movement pattern
- start a realistic baby essentials list, separating need, nice and not actually necessary
- check whether your shoes, bra, sleep setup or desk position need changing
Do not start monitoring your blood pressure at home unless you have been advised to, but do take routine checks seriously. If something feels wrong between appointments, call your midwife or maternity unit.