Baby Proofing for Nesting Season: Third Trimester Preparation

The weeks before your due date feel like the last quiet stretch you’ll have for years. You’re tired, your back aches, and the nursery still isn’t finished. But this window, roughly weeks 28 through 36, is the best time you’ll ever have to baby-proof your home. You’re mobile enough to get on your hands and knees, clear-headed enough to think systematically, and not yet managing a newborn on three hours of sleep.

I learned this the hard way with my first. I kept telling myself I’d handle the cabinet locks and furniture anchors after she arrived. She arrived. I did not handle them. For the first four months I was patching things together reactively, one near-miss at a time. With my second, I blocked off two weekends in my third trimester and worked through every room methodically. The difference was enormous.

Start With Furniture Anchoring

This is the highest-priority task on your list, and it’s the one most parents skip because it feels premature. Your baby won’t pull to stand for months, right? Correct. But the anchors need to go into wall studs, and finding studs, drilling pilot holes, and mounting anti-tip straps takes time and physical effort. Do it now.

Dressers, bookcases, and televisions are the primary concerns. Furniture tip-overs are a leading cause of unintentional injury in infants and toddlers, and the CPSC has made furniture anchoring a core part of its home safety guidance. Use anti-tip straps rated for your furniture’s weight and mount them into studs, not just drywall. For televisions, a wall mount or a low, anchored media console is safer than a strap alone.

Walk every room and look for anything taller than it is wide. If it can rock, it can fall.

Install Safety Gates Before You Need Them

Gates feel like a "later" item until you realize that "later" is when your baby is already mobile and you’re functioning on minimal sleep. Install them now.

The top of every staircase needs a hardware-mounted gate, bolted into wall studs or a solid door frame. Never use a pressure-mounted gate at the top of stairs. Pressure-mounted gates are appropriate at the bottom of stairs or in doorways, but at the top, a determined infant can push one loose. About 93,000 children under 5 are treated in U.S. emergency rooms each year for stair-related injuries, per a Nationwide Children’s Hospital analysis of CPSC NEISS data covering 1999–2008. That’s roughly one child every six minutes.

For gates, look for products certified to ASTM F1004, the federal safety standard for expansion gates and expandable enclosures, made mandatory under 16 CFR Part 1239 effective 2021. The certification mark should be on the packaging.

Address Cords, Blinds, and Window Coverings

Every room where your baby will sleep or play needs a cord audit. Blind pulls, curtain cords, and charging cables all pose strangulation risks to infants and young children. This is not a theoretical concern.

The safest option is cordless window coverings throughout the baby’s room and any play area. If you’re not replacing blinds right now, use cord wind-ups or cord cleats mounted well out of reach, and route all electrical cords behind furniture or through cord management channels.

My older daughter’s room had a single corded blind I’d never thought twice about. I replaced it with a cordless roller shade during my second pregnancy, and I’m glad I did it before I was managing two kids and a sleep deficit.

Outlets and Tamper-Resistant Receptacles

Standard outlets are at exactly the wrong height for a crawling baby. The CPSC recommends built-in tamper-resistant receptacles over removable plastic plug covers, and for good reason: the covers themselves can become choking hazards if a toddler pulls one out. Tamper-resistant outlets have internal shutters that only open when equal pressure is applied to both slots simultaneously, which a child poking at them cannot do.

If your home was built or renovated after 2008, you likely already have tamper-resistant outlets in living areas. Check by looking for the letters "TR" stamped between the slots. If yours don’t have them, an electrician can swap them out, or you can do it yourself if you’re comfortable with basic electrical work. Either way, do it now, not after the baby arrives.

Set Up a Safe Sleep Space

The AAP recommends room-sharing without bed-sharing for at least the first six months. That means a firm, flat sleep surface in your bedroom: a bassinet, crib, or play yard that meets current CPSC standards. No inclined sleepers, no soft bedding, no positioners.

Set this up before your due date and test it. Make sure the mattress fits snugly with no gaps at the sides. If you’re using a hand-me-down crib, verify it meets current CPSC standards. Older drop-side cribs were recalled and are not safe for use. The CPSC maintains a recall database at cpsc.gov if you want to check a specific model.

Lock Up Medications, Supplements, and Cleaning Products

Poisoning exposures are a leading cause of unintentional injury in young children, and the window between "not mobile" and "opening cabinets" is shorter than it feels. Install cabinet locks on every lower cabinet that holds medications, vitamins, supplements, cleaning products, dishwasher pods, or anything else you wouldn’t want a toddler to eat.

I know this from experience. My younger daughter emptied the cabinet under the bathroom sink in the time it took me to answer the front door. She was 18 months old, fast, and had apparently been studying that cabinet for weeks. We had already moved the cleaning products to a locked cabinet, but the experience clarified exactly how quickly it happens.

Use magnetic locks or spring-loaded latches on lower kitchen and bathroom cabinets. Move anything toxic to a high shelf or a locked storage area. Do this before the baby arrives, not after.

Set Your Water Heater to 120°F

This is a five-minute task that requires no ongoing supervision once it’s done. Set your water heater to 120°F (49°C) or lower. The American Burn Association’s Scald Injury Prevention Educator’s Guide notes that a full-thickness burn can occur in about 5 seconds at 140°F versus roughly 5 minutes at 120°F. Children have thinner skin than adults and burn faster at the same temperature and exposure time.

Find your water heater, locate the thermostat dial, and turn it down. Check your tap water with a cooking thermometer to confirm. Done.

The Floor-Level Walk-Through

This is the single most useful thing you can do that no checklist fully captures. Get on your hands and knees and move through every room your baby will spend time in. You will see things you’ve never noticed from standing height.

Look for: small objects that rolled under furniture, sharp corners on coffee tables and hearths, cords you missed from above, gaps behind appliances, anything a baby could put in their mouth. Bring your phone and photograph every hazard you find. The photos serve two purposes: they give you a prioritized to-do list, and they let you confirm later that you addressed each item.

Choking hazards include anything that fits through a toilet paper tube. Batteries, button cells, small magnets, and long strings or cords are specific concerns beyond just size.

Smoke and Carbon Monoxide Detectors

Per CDC guidance, smoke and carbon monoxide detectors are non-negotiable safety infrastructure. Install them on every level of your home, inside and outside sleeping areas. Test them monthly. Replace batteries annually or when the low-battery chirp starts. Carbon monoxide detectors have a service life of 5–7 years; check the manufacture date on the back of any existing detectors.

If you already have detectors, test them now and note when they were manufactured. This takes ten minutes and protects your entire family.

Pets and Newborns

If you have pets, plan their space now. Dogs and cats should not have unsupervised access to your baby’s sleep area. Set up baby gates or door barriers that allow you to separate spaces before you need them. Practice the new boundaries with your pets before the baby arrives so the adjustment isn’t happening simultaneously with everything else.

This is a logistics issue as much as a safety one. A dog that’s used to sleeping in your bedroom will need a new routine. Starting that transition in your third trimester is far easier than starting it the night you come home from the hospital.

The Third Trimester Is the Window

You won’t have this combination of time, mobility, and focus again for a while. Block off two weekends, work through each room systematically, and document what you’ve done. The goal is not a perfect home. It’s a home where the highest-risk hazards are addressed before your baby arrives and before you’re too exhausted to think straight.

Start with anchoring and gates. Add the water heater adjustment and cabinet locks. Do the floor-level walk-through last, once everything else is in place, and use your photos to close out any remaining items. By the time you’re in the final stretch before your due date, the safety infrastructure should already be done.