GUIDE
Your baby is opening their eyes for the first time this week, and brain wave patterns now show distinct sleep and wake cycles.
At the size of a zucchini, your baby has REM and non-REM sleep patterns, and their lungs continue to mature toward independent breathing.
Be prepared from day one
Your baby is about the size of a zucchini — roughly 14 inches long and weighing about 1.7 pounds. This week brings a remarkable milestone: your baby is opening their eyes for the first time.
After being fused shut since early in the second trimester, your baby's eyelids are finally separating and opening. Your baby can now blink and respond to bright light. If you shine a flashlight on your belly, they may turn toward or away from it. The irises do not yet have much pigment — most babies' eyes appear blue or dark at this stage, regardless of what their final color will be. True eye color develops over the first several months after birth.
Brain development is hitting a major milestone this week. Electroencephalogram (EEG) studies of fetuses at this gestational age show distinct patterns of REM (rapid eye movement) and non-REM sleep. This means your baby has organized sleep cycles — they are cycling through periods of active sleep (with rapid eye movements and increased brain activity) and quiet sleep (deeper, more restorative). REM sleep is thought to play a crucial role in brain development, helping to build and strengthen neural connections.
The lungs continue to develop, with surfactant production steadily increasing. The branch-like structure of the airways is growing more complex, and the blood vessels that will eventually handle oxygen exchange are maturing. Your baby is still not ready to breathe independently, but each week brings them closer.
Since last week, fat deposits continue to increase, and your baby's movements may feel more purposeful as the nervous system matures.
At 26 weeks, you are in the final stretch of the second trimester. Your uterus extends about 2.5 inches above your belly button, and the physical demands of pregnancy are intensifying.
Sleep disruption is one of the most common complaints at this stage. Between the difficulty of finding a comfortable position, frequent bathroom trips, leg cramps, heartburn, and your baby's active schedule (which may not align with yours), getting a full night of uninterrupted sleep is rare. Prioritize rest when you can, even if it means short naps during the day.
Heartburn may be more persistent as your growing uterus pushes your stomach upward and the hormone progesterone relaxes the valve between your stomach and esophagus. Eating smaller meals, staying upright after eating, and avoiding trigger foods (spicy, acidic, fried) can help. Talk to your provider about safe antacids if dietary changes are not enough.
Pelvic pressure is increasing as your baby grows heavier. You might feel a sense of heaviness or fullness in your pelvis, especially after standing for a while. A maternity support belt can help distribute the weight more evenly.
If you notice intense itching — especially on your palms and the soles of your feet — mention it to your provider. While most pregnancy itching is caused by stretching skin, severe itching on the palms and soles can occasionally indicate cholestasis of pregnancy, a liver condition that requires monitoring and sometimes early delivery.
Every pregnancy is different. As you near the end of the second trimester, do not hesitate to discuss any symptom that is affecting your daily life with your provider.
This week is about comfort, preparation, and paying attention to your baby's emerging patterns.
Your skin is stretching rapidly and may feel dry, tight, or itchy. Apply a rich, fragrance-free moisturizer or oil at least twice a day. While this will not prevent stretch marks (those are mostly genetic), it will significantly reduce itching and keep your skin more comfortable.
Your baby now has distinct sleep and wake cycles. You may notice periods of quiet (sleep) and activity (awake). Pay attention to when your baby tends to be most active — this pattern often continues after birth, which is useful information for planning your postpartum routine.
It is not too early. Car seat installation can be tricky, and many fire stations or police departments offer free installation checks. Having it done well before your due date means one less thing to worry about when labor starts.
Deep breathing, progressive muscle relaxation, or prenatal meditation can help manage the increasing physical discomforts and prepare you mentally for labor. Even 10 minutes a day can make a difference in how you handle stress and sleep quality.
When in doubt, call your provider. Severe itching, preeclampsia symptoms, and signs of preterm labor all warrant prompt attention.
At 27 weeks, your baby will be the size of a head of lettuce and will be opening and closing their eyes regularly, with established sleep-wake cycles. The third trimester officially begins at the end of next week — the home stretch.
If swollen feet or back pain are making daily life difficult, there are strategies to help you manage through the third trimester ahead.
This guide is for informational purposes only and is not a substitute for professional medical advice. Always consult your healthcare provider with any questions about your pregnancy.
