The breathing practice from last week continues, the fat accumulation accelerates, and this week brings the developmental event that has been building since week 8: the eyes are opening. After eighteen weeks sealed shut — fused to protect the developing retina — the eyelids are parting. Your baby is beginning to open and close their eyes for the first time, and what they are seeing, in the dim red-orange filtered light that penetrates through the abdominal wall, is the very beginning of visual experience.
The retina itself has been developing since the earliest weeks, but the neural connections between the eye and the visual cortex are still immature — the brain is not yet processing complex visual information. What opens at week 26 is not yet vision in the full sense; it is the mechanism for vision, being tested and calibrated in a carefully controlled environment. The first clear visual experience your baby will have — the bright, complex world of the delivery room — is still weeks away. But the system that will process it is, right now, completing its preparation.
The fat accumulation that has been mentioned in recent weeks is now accelerating noticeably. The baby's weight is increasing by around 100g per week from about now — it will roughly double between week 26 and birth at week 40. The characteristic softness and roundness of a full-term newborn, which is almost entirely subcutaneous fat, is being laid down week by week. The lean, almost translucent appearance of the early second trimester is giving way to the filled-out, recognisably newborn look that will be present at birth.
The brain is developing at an astonishing rate. New neural connections are forming by the millions each day. The surface of the cerebral cortex is folding into its characteristic ridged pattern — the gyri and sulci that give the brain its distinctive appearance — and will continue doing so through the third trimester and into the first years of life. The intellectual capacity that will define this person's inner life is being wired, right now, week by week.
Someone told me that the baby's eyes were opening at twenty-six weeks and I immediately thought about what they could see — this dim, warm, filtered redness. It made me think about the last thing they'd see before birth, and the first thing they'd see after. That transition from the warmth of the womb to the brightness of the room. I started thinking about how to make that moment as gentle as possible for them. It changed how I thought about the birth.
Week 26 brings an intensification of the physical symptoms that have been building through the second trimester's later weeks. The uterus is now above the navel — the fundal height measurable at around 26cm — and the pressure it exerts on surrounding organs is increasing with every week. Heartburn, back pain, and shortness of breath are likely more pronounced than they were at week 22, and will continue to intensify until engagement in the final weeks.
Shortness of breath. The diaphragm is being compressed upward. Slowing down, sitting upright (slouching compresses the lungs further), sleeping propped up, and accepting that your aerobic capacity is genuinely reduced are all appropriate responses. Sudden, severe breathlessness warrants prompt assessment.
Heartburn. Antacids remain safe; proton pump inhibitors (omeprazole, lansoprazole) can be prescribed if over-the-counter options aren't sufficient. Don't simply endure severe heartburn — it is treatable.
Oedema. Mild swelling in the ankles and feet is normal. Elevating feet when resting, staying active, and staying hydrated help. Sudden face or hand swelling requires same-day midwife contact.
The last week of the second trimester has a particular emotional quality: the accumulation of everything built since week 13, and the awareness that the third trimester — with its different demands and different pace — begins next week. For many people this is a moment of quiet taking stock. The golden period has been, mostly, golden. The body has been mostly manageable. The movements have been company. The milestones have been reached.
The eyes opening this week tends to produce a specific quality of wonder — the thought of them in there, in the warm dim light, beginning to look. It is the last of the major sensory activations of pregnancy, and it arrives with its own particular feeling: the sense that the baby inside is, now, the most complete version of themselves they can be while still in the womb. All the senses present. All the reflexes rehearsed. Waiting, and growing, and preparing.
Twenty-six weeks was when the pregnancy started feeling like a countdown rather than a state I was in. The eyes opening somehow made it feel more finite — more like the beginning of an end. Not in a sad way. In an anticipatory way. Like the last chapter of a book you don't want to finish but can't wait to see how it ends.
The third trimester approaching also means that the physical demands are about to increase and the preparation window is narrowing. If there are things that haven't yet been done — classes attended, preferences thought through, practical preparation made — this is the last comfortable week to begin them. The third trimester is not impossible for preparation; it is simply more tiring, more physically demanding, and more compressed in time.
As the second trimester closes, these guides point toward what comes next.
The second trimester ends next week. The fourteen weeks between 13 and 27 have been, for most couples, the most accessible and enjoyable stretch of the pregnancy — the symptoms eased, the anxiety reduced, the movements present and daily. Next week the third trimester begins, and with it a different quality of physical demand and emotional intensity. The preparation window closes further with each passing week.
If there are conversations that haven't yet happened — about birth preferences, about the postnatal period, about what support will look like in the first weeks with a baby — this is a good week to have them. Not from a place of urgency or anxiety, but from the settled calm of the second trimester's final days, while there is still space and energy to think clearly.
- Think about the birth environment. Your partner's birth experience is shaped significantly by the environment — who is in the room, what the lighting and sound is like, how involved you are. Discussing this now means arriving with a shared picture rather than negotiating it under pressure.
- The 28-week appointment is soon. Attend if possible — it is one of the most information-rich appointments of the second half of pregnancy and includes blood results, fundal height measurement, and birth preference review.
- Be genuinely present this week. The eyes opening, the fat accumulating, the third trimester approaching — this is a significant week in the pregnancy's internal arc. Acknowledge it together. The second trimester has been remarkable. You have both lived through something extraordinary.
Complete your birth preferences outline before the 28-week appointment. Birth preferences — sometimes called a birth plan — are most useful when they are: specific (not "I'd like to feel calm" but "I'd prefer dimmed lighting and minimal clinical discussion during active labour"); realistic (accounting for the possibility that plans may need to change); and shared with both your birth partner and your midwife in advance of the birth.
Environment: lighting, music, who is present, how you want to be communicated with during labour.
Pain relief: your preferences and openness — including whether you want to try gas and air, a pool, pethidine, or an epidural, and in what order or circumstances. The WiseMama birth plan builder lets you create, save, and print yours.
Third stage: physiological (natural delivery of placenta) or managed (injection of oxytocin). Ask your midwife to explain the difference if unclear.
Delayed cord clamping: the evidence for waiting at least one minute before clamping and cutting the cord is strong — it transfers significant iron-rich blood to the baby. Worth including specifically.
Skin-to-skin: immediate, uninterrupted skin-to-skin contact after birth is associated with improved bonding and feeding outcomes. Include your preference explicitly.
Feeding: your intention to breastfeed, combination feed, or formula feed — so that the postnatal team can support you appropriately.
If a caesarean becomes necessary: what your preferences are for the birth environment even in a theatre setting — music, who is present, delayed cord clamping where possible, immediate skin-to-skin.
As you approach the third trimester, raise this at your next appointment:
Your midwife knows the specifics of what your local unit offers — which birth environments are available to you, what the pool availability is, what the staffing ratio typically looks like, and what the processes are for different scenarios. Getting this information from the person who knows your local context, rather than from general online resources, means your preferences are grounded in what is actually possible. It also opens a relationship with your midwife around birth planning that will continue through the third trimester.