The brain folding that began last week continues at pace. The fat accumulation that will roughly double the baby's weight by birth is well underway. And this week brings a detail that is both anatomically complete and beautifully purposeful: every bone in your baby's body is now fully formed — but they remain soft.
The kicks and movements at week 29 are substantially more assertive than they were even four weeks ago. The baby at this stage has less room to manoeuvre than in the second trimester — the uterus is increasingly full — so movements are felt more forcefully against the uterine wall. What were rolls and stretches are now elbows, heels, and knees pressing distinctly against the abdomen. Some people report being woken by kicks at night, or visibly watching the surface of their bump move in response to a sharp jab.
The baby has reached 258mm and 1.15kg — growing at around 200g per week from now until the final run. The face is increasingly round and full as subcutaneous fat fills in; the newborn softness that parents recognise is now clearly present in the facial features. The lungs are maturing further — the surfactant production that began at week 24 is now more established, meaning the prognosis for premature babies continues to improve significantly with each additional week.
At twenty-nine weeks the kicks became undeniable. Not just felt but seen — a sharp protrusion against the skin that lasted a second and then was gone. My partner started timing them like they were catching trains. There was this sense of a person making themselves known. Insistent. Already completely themselves.
The third trimester's physical demands are establishing themselves this week. Back pain and pelvic girdle pain — mentioned in the second trimester as emerging possibilities — are now among the most common and most impactful symptoms for people in weeks 28–34. They are worth addressing directly rather than managing by endurance.
What helps both:
— Physiotherapy. This is the single most effective intervention, available on the NHS, and significantly more effective when started early. Ask your midwife for a referral this week if you haven't already.
— A support belt or pelvic girdle support band provides meaningful relief during activity.
— For PGP specifically: keep knees together when getting in or out of bed and the car; use a pillow between your knees at night; avoid asymmetric movements like standing on one leg to dress.
— Swimming and water-based exercise are particularly good — the buoyancy temporarily removes the gravitational load that worsens both conditions.
— Paracetamol is safe in pregnancy. Ibuprofen is not recommended from 30 weeks onward.
Week 29 sits in the thick of the third trimester's particular emotional register — a mixture of forward momentum, physical challenge, and growing practical urgency. The eleven weeks remaining is simultaneously a long time and, given how quickly the third trimester moves, a surprisingly short one. People who felt they had plenty of time at week 20 often find themselves at week 29 with a revised sense of the timeline.
The kicks at this stage tend to deepen the relationship with the baby in a new way. Second trimester movements were intimate but subtle; third trimester movements are assertive, specific, and sometimes startling. The baby is making themselves known with a force that is hard to ignore and impossible to misidentify. Many people describe this period as when the baby starts to feel like a distinct individual — someone with preferences, patterns, and a characteristic way of making their presence felt.
Twenty-nine weeks was when I stopped being able to imagine not knowing them. Up until then there was something abstract about it — a baby, coming, eventually. By twenty-nine weeks they'd kicked me hard enough to interrupt a meeting and I thought: this specific person, who has a preferred side and a busy time of day and a way of responding to music. I know them. We just haven't met yet.
Birth anxiety, if it is present, is likely growing alongside the growing belly. This is worth taking seriously — not by suppressing it, but by converting it into informed preparation. Every hour spent in an antenatal class, every conversation with a midwife about what labour involves, every realistic account read of a positive birth experience reduces the fear. Anxiety about the unknown is best met with knowledge, not reassurance.
The themes of week 29 connect to these full topic guides.
The third trimester asks partners to shift from emotional support toward practical co-ownership of the preparation. The things that need doing in the next eleven weeks are real and finite, and sharing responsibility for them — rather than leaving them as your partner's project — is both practically useful and relationally important. Preparation done together arrives at birth as shared readiness rather than one person's plan.
The physical demands on your partner are substantial now. Back pain and pelvic pain that affect daily movement, breathlessness that limits exertion, sleep that is increasingly disrupted — these are not complaints to be managed away but real experiences to be acknowledged and practically supported. Reducing the non-essential physical demands on your partner — the tasks that can be taken over without being asked — is the most straightforwardly useful thing you can do.
- Physiotherapy referral. If your partner hasn't yet had one and is experiencing back or pelvic pain, ask about it at the next appointment. The sooner the referral happens, the more sessions are available before birth.
- Hospital bag — actively help. Not delegate, help. Know what's on the list, contribute to packing it, and know where it is. You need to be able to grab it without being told where it is.
- Antenatal classes — be present and engaged. Not physically present and mentally elsewhere. Ask questions, take notes, engage with the information. The value of classes is proportional to how much both of you absorb from them.
- Talk about your fears about birth. Both of you may have them. Partners often feel the pressure to present as confident and reassuring, which can mean their own anxieties go unacknowledged. Honest conversation about what both of you are nervous about is more productive than performed certainty.
Ask for a physiotherapy referral if you are experiencing back pain or pelvic girdle pain. NHS physiotherapy referrals for pregnancy-related musculoskeletal pain are available and effective — but they require a referral, and the sooner you have one, the more appointments you will be able to have before birth. Pain that is affecting your ability to work, sleep, move, or perform daily tasks is worth raising this week, not at the next appointment, not when it gets worse.
At your next appointment — likely around week 31 — raise this:
The third trimester appointment schedule (typically 28, 31, 34, 36, 38, 40 weeks) means there is a gap between appointments. If any symptom becomes significantly worse between now and your 31-week appointment — particularly if it is affecting your ability to function — contact your midwife's team rather than waiting. You do not have to wait for a scheduled appointment to raise a concern.