The fat accumulation continues — 2.6kg now, gaining approximately 200g per week through to birth. The brain matures. The lungs finalise. And this week brings the last great biological fact of the guide: the skull that has been developing across all 36 weeks has been built, deliberately, with bones that do not fuse.
The degree of moulding that occurs during labour varies significantly. In a long or difficult labour, the head can change shape quite noticeably — elongated, asymmetric, the plates visibly overlapping. This can be alarming to see at first, but the moulded newborn head typically rounds out over 24–48 hours as the plates settle back into their resting position. There is no harm to the brain; the fontanelles provide precisely the safety margin needed.
The fontanelles — particularly the large anterior fontanelle (the soft spot you will feel at the top of the baby's head) — remain open until around 18 months of age as the brain grows. They are covered by a tough membrane and are safe to touch gently. Understanding this before birth means that the softness you feel when you first hold your newborn's head will not alarm you — it is one of the most elegant features of human biology, present specifically because it is needed.
The baby at 36 weeks is fully formed in every meaningful sense. The systems that continue to mature — primarily the brain's myelination and the lungs' final alveolar multiplying — do so on a curve, not a cliff edge. Each day is beneficial. Each week is significantly better. But from next week, at 37 weeks, a birth is considered full term.
Most babies are now firmly engaged — head deep in the pelvis, the cervix beginning its own slow preparation for labour. The vernix caseosa that has been protecting the skin since week 18 is gradually being absorbed; many babies arrive with only traces of it remaining. The lanugo that covered the body in the second trimester has largely gone. The baby that will be handed to you looks, in most respects, like a newborn.
When my midwife explained the fontanelle at the thirty-six week appointment — why the skull doesn't fuse, how the head can mould during birth — I remember feeling something shift in how I thought about labour. The body hadn't forgotten anything. Everything about this had been thought of. The shape of the skull, the softness of the bones, the ability to change shape and then recover. It was prepared for exactly what was coming. That made the birth feel less like something happening to me and more like a process that the whole body had been building toward. Which is, of course, exactly what it is.
The 36-week appointment is the most consequential remaining appointment before birth. After this, appointments are at 38 and 40 weeks — primarily monitoring and membrane sweep discussions. This is the last opportunity for a thorough birth preferences review, a formal position check, and any remaining clinical decisions before the birth window opens.
Birth preferences final review. Your preferences document should be finalised and the WiseMama birth plan builder can help you print copies. and copied — one for your notes, one for the hospital system, one for your birth partner. This is the last appointment to make adjustments with midwife input.
Group B Streptococcus (GBS). If you have had a positive GBS swab, or if you are having one at this appointment privately, the implications for labour are discussed: IV antibiotics are offered during labour to protect the baby from GBS infection. This is straightforward to arrange and does not significantly change the birth experience.
Colostrum harvesting. If appropriate (see week 35), harvesting can now begin. Your midwife will confirm technique, storage (sterile syringes in the freezer), and how to use it after birth.
Membrane sweep discussion. A membrane sweep — a cervical technique offered by midwives to encourage the onset of labour — can be offered from 40 weeks. Some trusts offer it earlier. The 36-week appointment is a good time to ask when it would be offered and whether it's something you would like.
The nesting instinct, mentioned at week 34, often reaches its peak around weeks 35–37. The compulsion to organise, prepare, and clean can feel urgent and purposeful. It is genuinely useful when directed toward practical preparation — and worth managing when it becomes overexertion. At 36 weeks, physical tasks that raise the heart rate significantly, require prolonged standing, or involve heavy lifting should be done by someone else. Rest is not optional at this stage.
Increased Braxton Hicks. More frequent and sometimes more intense than before. Still irregular and stopping with position changes.
Change in discharge. An increase in vaginal discharge — clear or slightly cloudy, watery or mucousy — is normal as the cervix begins to soften and dilate slightly. A blood-tinged mucous plug release (a "show") may follow; it signals the cervix is beginning to change but does not indicate imminent labour.
Pelvic pressure and lower back ache. The baby's engaged head exerts sustained pressure on the cervix, pelvic floor, and surrounding structures. Aching in the lower back and pelvic region, a sense of heaviness, and increased need to urinate are all typical.
Emotional intensity. Many people report a shift in their emotional state in the final weeks — a mix of readiness and apprehension, heightened sensitivity, and occasional tearfulness. This is physiological as much as psychological; the hormonal preparation for birth has emotional effects.
Week 36 occupies a specific emotional space: the last week before the birth window opens. From next week, the baby could arrive safely. The thing that has been abstract for months is now a specific, imminent reality. The hospital bag is packed. The number is saved. The preparations are made. And yet the birth itself — the actual experience, the actual day — remains unknown. Week 36 is often when that unknowing becomes most present.
The skull detail this week has a particular effect on people preparing for birth: the knowledge that the body engineered the head to mould through the birth canal, that the fontanelles are there specifically because they are needed, that nothing about this process was unconsidered — it functions as a kind of evidence that the body knows what it's doing. The affirmation says it directly: "Your body knows exactly what to do." That is not reassurance. It is anatomy.
Thirty-six weeks was when I stopped being pregnant in my head and became someone about to give birth. The shift was specific and sudden — I woke up one morning and thought: this is the last week I can say the birth is weeks away. Next week it becomes possible. My whole relationship to time changed. I started noticing everything differently. The last time I'd drive to work as someone without a baby. The last Saturday before everything changes. I kept wanting to mark things, to note them, to preserve them.
If there is any unfinished emotional preparation — conversations not had, fears not named, anxieties not addressed — this is the last week that feels genuinely spacious enough for them. The weeks between now and the birth will be more physically demanding and more emotionally compressed. The Emotional Wellbeing in Pregnancy guide and the Relationships After Baby guide are both worth reading this week if not already done.
Everything that can be read before 37 weeks should be read this week. These are the guides that matter most right now.
Next week the birth window opens. Everything that needed to be prepared should be prepared by now. The hospital bag is packed and by the door. The car seat is fitted. The sleeping arrangement is ready. The birth preferences document is finalised. The maternity triage number is in both your phones. You know the route to the hospital at 3am.
If any of that is not true — fix it this week. Not next week. This week.
- Know the labour signs cold. Regular intensifying contractions (time them — 5 minutes apart for a first baby), waters breaking (call immediately), show (labour may follow in hours or days), reduced movement (call immediately, any time). See Preparing for Labour & Birth for the complete early labour guide.
- Attend the 36-week appointment. This is the last major clinical check. Position is confirmed, birth preferences finalised, GBS discussed. Being there means being fully informed for whatever comes next.
- The skull detail this week is worth sharing. The unfused skull, the fontanelles, the moulding during birth — understanding why the head looks the way it does immediately after birth prevents alarm and allows you to be a calm, informed presence in the room rather than a worried one.
- Read the Fourth Trimester guide before birth if you haven't. The most common partner failure in the postnatal period is being unprepared for how hard the first twelve weeks are. Reading it now gives you a realistic picture before you're in it.
Make the 36-week appointment your best-prepared appointment of the entire pregnancy. Bring your finalised birth preferences (printed, three copies). Bring a list of every symptom or concern since 34 weeks. Bring the questions that remain unanswered. This is your last substantive conversation with your midwife before the birth. Use every minute of it.
— Is there anything in my clinical history that affects my birth preferences?
— When would you offer a membrane sweep, and what does it involve?
— What is the plan if I go past 41 weeks? What does induction involve at this trust?
— If my waters break but contractions don't follow — how long do I wait before coming in?
— What number do I call at 3am if I'm not sure whether I'm in labour?
— Is there anything I should watch for specifically in the next four weeks that would prompt an earlier call?
After the clinical checks and the birth preferences review, ask this:
This question, asked and answered in full at 36 weeks, removes the single most common source of early labour confusion: not knowing whether what is happening is labour, when to call, and what to say. Having a clear, specific, practised mental script — not a general sense of "I'll call when contractions are regular" — means you will act confidently and at the right moment. Your midwife knows your trust's specific protocols. Get the answer from them, not from a search engine at 2am.