Your baby this week
Your baby now weighs about seven and a half pounds — some a little less, some a little more, and both neighborhoods are normal — and measures around twenty inches, about the size of a pumpkin. There is no development left to report, and that absence is the report: every system is built, matured, and tested. The lungs are ready for air.
The digestive system stands by for its first meal. The grip reflex is set to wrap around your finger. The bones are strong — all except the skull plates, which remain flexible by design until their one great journey is done.
The finishing details are the sweetest ones. The vernix has mostly gone now, lingering mainly in the soft creases — neck, elbows, behind the knees. The skin underneath has smoothed and plumped into the finished newborn version.
Your baby's senses are tuned and waiting: your voice, the most familiar sound in the world, is the one they will turn toward in their first hour of life. And your baby is still, quietly, growing — a little more fat, a little more brain wiring — because from your baby's point of view, nothing about this week is "late." This is simply still home. Which means the movement report is unchanged, and gloriously so: your baby's pattern — the rolls, the pushes, the stretches, the wakeful evening sessions you've known for months — should continue exactly as it has, right up to the day labor begins, and through early labor too.
A full-term, fully-grown, snugly-packed baby does not move less. Say it the way we've said it since week 28: learn your baby's pattern, and if it ever changes — fewer movements, a different rhythm, a quiet that feels wrong — call right away, that day, that hour. It is the single most important sentence in this entire series, and it does not expire at the due date.
Your baby is ready, mama. All of you is ready. The only thing left is the day — and the honest truth about that day is next.
The due date, honestly
So let's dismantle the due date, gently and once and for all. A due date is not a deadline, an appointment, or a promise. It is an estimate — calculated from the first day of your last period, or from an early ultrasound measurement — of the middle of the window in which your baby is most likely to arrive.
Windows, not moments. And here is the statistic that should be printed on pillows: only about half of babies arrive on or before their due date. The rest — a completely ordinary, healthy, unremarkable half of all babies — arrive after it.
In fact, the great majority of babies are born somewhere between weeks 37 and 42, and first babies, famously, tend toward the later side of their window. Sit with what that means at week 40. If your date arrives this week — or passes — with no baby, nothing has gone wrong.
Nothing is overdue in any dramatic sense; the very word is a leftover from a less patient era. You have not missed anything, failed anything, or kept anyone waiting but the group chat. Your baby is on baby time, which has never once consulted a calendar, and your care team — who deliver post-due-date babies every single week of the year — regards this situation the way pilots regard a mild headwind: routine, expected, and handled with a plan.
Which is exactly what a later section covers: what that plan looks like from your seat, and the role your doctor plays in leading it. First, though, a word for the person doing the actual waiting — because week 40 is as much about you as it is about dates.
Your body & mind: the last wait
Physically, week 40 is week 39 with the volume turned up slightly: the low, heavy pelvis; the evening contractions that audition and retire; sleep in installments; a body that feels both utterly ready and oddly suspended. Prodromal contractions may come and go for days — real preparation, real work, and absolutely worth mentioning at your appointments so your team knows your rhythm. Your cervix, meanwhile, may be changing in ways you can't feel at all — or not changing yet in ways anyone can measure.
Both stories end the same way: with a baby. The timing is the only difference, and it was never ours to schedule. Emotionally, this week runs the full orchestra.
Excitement so sharp it feels like nerves. Irritability at the world's most-asked question. A strange tenderness about the pregnancy itself — the kicks you'll soon only remember, the belly that has been your landscape for most of a year.
And sometimes, honestly, a flat, quiet tiredness with the whole production. Every one of those is a normal week-40 feeling; none of them is a verdict on your readiness or your gratitude. Two kindnesses to practice daily: limit the audience — the copy-paste reply, the quiet phone, the partner acting as spokesperson — and keep the small pleasures coming, exactly as we planned last week.
And one sentence to borrow whenever you need it, from every woman who has waited out this week before you: the baby is coming. Not one baby in history has stayed in. Yours will not be the first.
If the wait continues: doctor-led monitoring
Now, the practical map for if — and for half of you, when — the due date passes. First: your appointments continue, usually on the same weekly rhythm, running the same vital checks — blood pressure and urine, growth and heartbeat, position and pattern. Second: as the days past your due date add up, your doctor may suggest some extra monitoring — things like a period of listening to your baby's heartbeat on a monitor, or an ultrasound to check on your baby and the fluid around them.
These are routine, precautionary check-ins, offered because your team likes eyes on a baby who is taking the scenic route — not because anything is wrong. If they're offered, ask what they're checking and what happens with the results; understanding them turns them from worrying to reassuring, which is what they're for. Third — and hold this one carefully — if the wait continues, there will come a conversation about options for encouraging labor, including induction.
That conversation belongs to your doctor, who knows your body, your baby, and your history, and who will lay out the timing and the choices as they apply to you. Your role in it is questions, preferences, and consent — the same role you've had all along, and our Birth Plan post is still worth having in your chart when it happens. What you do not need is the internet's folklore department: steer clear of "get labor started" home remedies doing the rounds online — some are useless, and some are genuinely unsafe in pregnancy — and if anything like that tempts you at 2 a.m., that temptation is a question for your doctor, not a search engine.
Your team's plan, built on your actual situation, beats every comment thread ever written. Wait with them, and the waiting has a shape.