Third Trimester Checklist: What Every Mom Needs Before Baby Arrives

The third trimester has a way of sneaking up on you — one week you’re still working through your registry, and the next you’re counting kicks and wondering if the hospital bag should already be by the door. Whether this is your first baby or your third, a good third trimester checklist takes the guesswork out of these final weeks so you can spend less time worrying and more time actually enjoying the countdown.

This guide walks through everything from medical appointments and hospital bag essentials to nursery prep, postpartum recovery items, and the small emotional to-dos that often get forgotten in the rush. It’s organized week by week, broken down by whether this is your first, second, or third baby, and built to be printable so you can check things off as you go — no matter where in the world you’re preparing for baby (including UK-specific notes for NHS care).

Consider this your one-stop third trimester pregnancy checklist: practical, realistic, and written by people who know that “nesting” usually means alphabetizing onesies at 11pm.

Third Trimester Checklist Week by Week

Every pregnancy moves at its own pace, but here’s a general third trimester weekly checklist to keep you on track from week 28 to week 40+.

Week	What To Focus On
28–30	Glucose screening follow-up if needed, start weekly-to-biweekly prenatal visits, begin researching pediatricians
31–32	Pack a “go bag” starter kit, install the car seat, tour your hospital or birth center
33–34	Finalize your birth plan, pre-register at the hospital, wash baby clothes and linens
35–36	Group B strep test, pack the full hospital bag, set up the nursery essentials
37	Baby is considered full term — pack car with hospital bag, install car seat if not done
38–39	Weekly checkups, pack postpartum comfort items, prep freezer meals
40+	Discuss induction options if overdue, rest, stay close to home

This third trimester checklist week by week structure is a guide, not a rulebook — your OB or midwife may adjust timing based on your specific pregnancy.

Third Trimester Checklist: Things To Do (Master List)

Here’s the full third trimester checklist things to do, grouped by category so it’s easy to scan.

Medical & Appointments

Attend all scheduled prenatal visits (typically every 2 weeks until 36 weeks, then weekly)
Complete glucose screening and Group B strep test
Discuss your birth plan with your provider
Pre-register at your hospital or birth center
Confirm pediatrician choice before baby arrives
Ask about pain management options and what’s available at your facility

Practical & Logistics

Install and inspect the car seat (many fire stations and hospitals offer free checks)
Pack the hospital bag for you, your partner, and baby
Prepare a birth plan copy for your bag
Set up a plan for pet care or older children during labor
Arrange maternity/paternity leave paperwork with your employer
Stock the freezer with easy meals
Install a baby monitor if using one

Nursery & Baby Gear

Set up the crib and test the mattress fit
Wash all baby clothes and linens in baby-safe detergent
Childproof outlets and secure furniture
Stock diapers in newborn and size 1
Set up the changing station within reach of supplies

Emotional & Personal

Rest — genuinely, without guilt
Talk through fears or anxieties with your partner or a professional
Take maternity photos if desired
Write a letter to your baby or future self
Plan simple, low-pressure ways to spend time with your partner before baby arrives

Hospital Bag Checklist

Pack this by week 35–36 so it’s ready no matter when labor starts.

For Mom:

ID and insurance card, comfortable robe or nightgown, nursing bras, toiletries, phone charger (long cord), going-home outfit, maternity pads.

For Baby:

Going-home outfit (2 sizes, since newborns vary), swaddle blanket, hat, car seat installed and ready.

For Partner:

Change of clothes, snacks, entertainment for a long labor, camera or phone charger.

Nursery & Nesting Checklist

A third trimester nesting checklist helps channel that burst of energy productively instead of leaving you exhausted before labor even starts.

Deep clean and organize the nursery
Wash and put away baby clothes by size
Stock a diaper caddy for each floor of the house
Prepare postpartum recovery station (pads, pain reliever, peri bottle, comfy clothes)
Set up a simple system for tracking feeds and diapers early on

Third Trimester Checklist for Second or Third Baby

A third trimester checklist second baby or third trimester checklist 3rd baby looks a little different — you know the basics, but now there’s a sibling (or two) to plan around.

Arrange childcare for older kids during labor and delivery
Prep a “big sibling” bag with snacks, activities, and a small gift from the new baby
Talk to older children about what to expect, in age-appropriate terms
Rotate or replace baby gear that’s worn out from previous use
Double-check car seat expiration dates — they do expire, typically 6–10 years from manufacture
Line up extra help for the first few weeks, since attention will be split

This second and third trimester checklist approach — starting some prep earlier in the second trimester — tends to work better for parents managing a household that already includes kids.

Third Trimester Checklist UK: NHS-Specific Notes

For parents following a third trimester checklist UK, a few specifics differ from other countries:

Appointments follow the NHS schedule: typically at 28, 31 (first-time moms), 34, 36, 38, 40, and 41 weeks
Anti-D injection offered around 28 weeks if you’re RhD negative
Whooping cough vaccine recommended between 16–32 weeks (ideally before 32)
Register with a health visitor before your due date
Check your Maternity Exemption Certificate for free prescriptions and dental care
Pack for a hospital stay knowing many UK hospitals have limited on-site shops — bring your own snacks and toiletries

Printable Third Trimester Checklist

Want a third trimester checklist printable version? Print the master “Things To Do” list above, pin it to the fridge, and check off items as you go — a simple, low-tech way to track progress without needing to log into an app during the most tired weeks of pregnancy.

FAQs

What should be on a third trimester checklist for first time moms?

Focus on the fundamentals: prenatal appointments, hospital bag, car seat installation, birth plan, and pediatrician selection. First-time moms often benefit from also touring the hospital and asking extra questions about what labor and postpartum recovery actually look like.

When should I start my third trimester to-do list?

Most of the essential prep — hospital bag, car seat, nursery — should be done by 36 weeks, since babies can arrive before their due date.

Is a third trimester checklist different for a second or third baby?

Yes — childcare for older siblings, updating outdated gear, and prepping kids emotionally for a new baby become priorities alongside the usual medical and hospital prep.

Do I need a different checklist if I’m in the UK vs. the US?

The core to-dos are similar, but appointment schedules, vaccine timing, and what’s provided by the hospital differ, so it’s worth checking NHS-specific guidance alongside a general checklist.

What’s the most commonly forgotten item on a preparing-for-baby checklist?

Postpartum recovery supplies for mom — pads, comfortable clothing, pain relief — often get overlooked while everyone focuses on baby gear.

Final Thoughts

A solid third trimester checklist isn’t about doing everything perfectly — it’s about lowering the mental load so you can be present for these last few weeks. Whether you’re using a full preparing for baby checklist third trimester approach for your first baby, or a lighter version for your third, the goal is the same: walk into labor day feeling ready, not rushed.