The third trimester is when pregnancy gets physically demanding, emotionally intense, and logistically real. Your wife’s body is working harder than it has at any other point, and the most useful thing you can do is show up in specific, practical ways rather than simply asking “what do you need?” Here’s what actually helps.
Ease the Physical Discomforts
By the third trimester, your wife is carrying significant extra weight, and her body is letting her know. The most common complaints are swollen feet and ankles, lower back and pelvic pain, and insomnia. Each one has something you can do about it.
Swelling happens because the growing baby compresses blood vessels, slowing circulation in the legs and feet. You can help by bringing her a footrest or stacking pillows so she can elevate her legs while sitting. Encourage her to change positions frequently and avoid standing or sitting in one spot for too long. Keep cold water nearby and cut back on heavily salted meals when you’re cooking, since sodium makes the body retain more fluid. If she doesn’t already have compression socks, pick some up.
Pelvic and lower back pain often intensifies in the final months as ligaments stretch to accommodate the baby. A physical therapist who specializes in prenatal care can teach specific exercises that help, so offering to book that appointment and drive her there is a concrete way to support her. In the meantime, a warm (not hot) bath, a gentle lower-back rub, or a heating pad on a low setting can ease the ache.
Insomnia is extremely common in the third trimester. Help her set up the bedroom for better sleep: keep the room cool and quiet, and arrange a pillow system that supports side sleeping. The ideal setup is one pillow under the head, one supporting the belly, one behind the back, and one between the knees to reduce hip strain. A full-length pregnancy pillow can replace most of these. Sleeping on the left side is generally recommended by physicians in late pregnancy. A warm shower or light stretching before bed can also help her wind down.
Provide Emotional Support That Counts
The third trimester brings a specific kind of anxiety: the birth is no longer abstract. Your wife may worry about labor pain, complications, whether the baby is healthy, or how life will change. These fears don’t need to be solved. They need to be heard. Listening without immediately jumping to reassurance or problem-solving is one of the most valuable things you can offer.
Research on couples during pregnancy shows that emotional intimacy often dips early in pregnancy but gradually recovers through the second and third trimesters. Interestingly, commitment in men tends to increase as pregnancy progresses, often reaching levels higher than before the pregnancy began. That growing sense of partnership is real, and expressing it matters. Tell her she’s doing an incredible job. Be specific: notice when she’s pushing through discomfort, acknowledge how hard it is, and don’t minimize what she’s going through.
Physical intimacy may look different right now, and that’s normal. Some couples pull back from sexual contact out of fear that it could cause harm, but in a healthy pregnancy, it’s generally safe. The key is honest conversation about what feels comfortable and what doesn’t, without pressure in either direction.
Learn the Warning Signs
You don’t need to become a medical expert, but knowing a few red flags can make a critical difference. The CDC identifies several urgent warning signs during pregnancy that should prompt an immediate call to a healthcare provider or a trip to the hospital:
- Severe headache that won’t go away, gets worse, comes with blurred vision or dizziness, or starts suddenly with intense pain. These can indicate preeclampsia.
- Extreme swelling of hands or face, especially if her fingers become hard to bend or her eyes look puffy. Mild foot swelling is normal; sudden swelling in the face and hands is not.
- Severe belly pain that starts suddenly, gets worse over time, or is accompanied by chest, shoulder, or back pain.
- Vision changes like flashes of light, bright spots, blurred vision, or double vision.
- Vaginal bleeding or fluid leaking, which could signal preterm labor or other complications.
- Changes in baby’s movement. There’s no single “normal” number of kicks. What matters is a noticeable change from the baby’s usual pattern.
On that last point, many providers recommend a simple kick-counting practice: the baby should produce at least 10 movements within a two-hour window. Every baby has a different baseline, so what you’re watching for is a departure from what’s typical for your baby. If your wife mentions the baby seems quieter than usual, take it seriously and encourage her to call her provider.
Know the Difference: Braxton Hicks vs. Real Labor
In the third trimester, your wife will likely start feeling practice contractions called Braxton Hicks. They can be startling the first time, so it helps to know how to tell them apart from real labor.
Braxton Hicks contractions are irregular, don’t get closer together over time, and often stop when she changes position or activity. They can last anywhere from a few seconds to two minutes. If she can sleep through them, they’re Braxton Hicks. Real labor contractions come at regular intervals, get progressively closer together and stronger, and continue (or intensify) with movement or position changes. True contractions last between 30 and 90 seconds and get longer over time. If contractions are becoming regular and more intense, it’s time to call the provider.
Handle the Logistics
One of the best things you can do in the third trimester is take tasks off your wife’s plate. Not chores she asks for help with, but the ones you notice and handle before she has to think about them.
Start with the hospital bag. Pack it by week 36 so neither of you is scrambling. For her, include a front-opening robe or shirt for nursing and skin-to-skin contact, loose pajamas for visitors, slippers, a nursing bra, maternity underwear, toiletries, snacks, and a tennis ball for massage during labor. Her going-home outfit should be loose, roughly the size she wore at six months pregnant. For yourself, pack a phone charger, camera with a charged battery, toothbrush, light snacks, water, layered clothing (delivery rooms can run cold), and a front-opening shirt so you can do skin-to-skin with the baby too. Some partners also pack a bathing suit in case they need to help in the shower during labor.
Beyond the bag, take care of practical household prep. Stock the freezer with meals you can reheat in the weeks after birth. Buy groceries that are easy to prepare and include plenty of hydrating drinks. Set up a recovery station on the main floor of your home, since she’ll likely be discouraged from climbing stairs after delivery. Make sure she can reach essentials like water, snacks, phone charger, nursing supplies, and the remote without bending or twisting. Have heavy menstrual pads, a postpartum belly band, nursing pads, and supportive underwear ready before you leave for the hospital.
If family or friends are coming to help after the birth, prepare their space now: clean sheets, towels, toiletries. This isn’t glamorous work, but it’s the kind of forethought that makes the first weeks home dramatically easier.
Take on Nutrition
Your wife’s calorie needs increase by roughly 450 calories per day during the third trimester, up from about 340 extra in the second trimester. That’s not a huge amount of food, but what matters is the quality. Iron needs nearly double during pregnancy, and omega-3 fatty acids are critical for the baby’s brain development.
You can help by cooking meals rich in iron (red meat, spinach, lentils, fortified cereals) and omega-3s (salmon, sardines, walnuts). Make sure she has easy access to nutrient-dense snacks throughout the day, especially if nausea or fatigue makes large meals unappealing. If cooking isn’t your strength, ordering from a meal delivery service or batch-prepping simple recipes on the weekend still counts.
Prepare to Be Her Partner in Labor
Your role during labor is to comfort, advocate, and take burdens off her. You don’t need to be a medical professional. You need to be present and attentive.
Practical things you can do during labor: offer ice chips, hold her hand, stroke her hair, provide reassuring words, and give massages (a tennis ball pressed into the lower back during contractions can be a lifesaver). Pay attention to what she needs rather than waiting for her to articulate it. If she’s thirsty, bring water. If she’s hot, get a cool cloth. If she wants quiet, stop talking.
Before the birth, discuss her birth plan together so you can advocate for her preferences if she’s unable to communicate them clearly during labor. Know what she wants regarding pain management, who she wants in the room, and what matters most to her about the experience. Being her voice when she needs one is one of the most important things you’ll do that day.
Set Up the Postpartum Home
Most partners focus entirely on preparing for the birth and forget that recovery starts the moment they get home. Your wife will be physically healing, sleep-deprived, and adjusting to feeding a newborn around the clock. The more you prepare now, the less overwhelming that transition will be.
Organize the house so she doesn’t need to reach high shelves or bend to low ones. Move diapers, wipes, burp cloths, and changing supplies to multiple spots around the house so she’s never far from what she needs. Set up a comfortable nursing or feeding station with a supportive chair, a side table for water and snacks, and good lighting. If you have pets, arrange for someone to handle walks and feeding during the first week. If you have other children, line up childcare or playdates in advance.
The postpartum period is when everything you prepared gets tested. Having a freezer full of meals, a clean house, and a plan for visitors isn’t over-preparing. It’s giving your wife the space to heal and bond with your baby without worrying about everything else.