Oxygen
Every breath you take,
your baby feels it too.
Here's the simple science behind PosturAir™ — explained clearly, with real sources you can check yourself.
7 scientific studies linked below · No claims without sources
It's not just about feeling better.
It's about oxygen.
Most maternity products are made to help you feel more comfortable. That's important. But when we created PosturAir™, we asked a different question:
What is actually happening to your baby, every single day, during pregnancy?
We looked at the science of breathing, posture, and how oxygen travels from your lungs to your baby. What we found changed everything about how we designed these leggings.
"Oxygen doesn't reach your baby by accident. It travels a specific path — from your lungs, into your blood, across the placenta. Every step of that journey depends on you."
Everything on this page is backed by published, peer-reviewed research. Every claim links to its source. Because you deserve real answers — not just marketing.
📖 How to read this page: Each section explains one step of the science — simply, without jargon. If you want to go deeper, the research links are right there. Take your time. There's no rush.
From your posture to your baby's oxygen — 4 simple steps
The connection between how you hold yourself, how deeply you breathe, and how much oxygen reaches your baby is real and documented. Here it is, one step at a time.
As your baby grows, your breathing space shrinks
Your diaphragm is the muscle that controls every breath. As your baby grows, the uterus pushes upward — and your diaphragm gets pushed up with it. Studies confirm it can move up to 5 cm higher than its normal position.
This means there's simply less room for your lungs to expand. Each breath becomes a little shallower. Less air in — less oxygen for you, and for your baby.
📄 Source — European Respiratory JournalSlouching can reduce your breathing capacity by up to 27%
When the weight of your bump pulls you forward, your spine curves and your ribcage collapses inward. This gives your diaphragm even less room to move — on top of what the baby is already taking up.
Research shows that available lung capacity drops by 14% to 27% in the third trimester. Poor posture makes this significantly worse — but good posture can protect it.
📄 Source — CHEST Journal 📄 Source — PubMed 38863888The placenta delivers exactly what your blood contains — no more
Think of the placenta as your baby's lungs. It transfers oxygen from your blood to his. But here's the key thing: it can only pass on what it receives. If your blood has less oxygen, less oxygen reaches your baby.
The placenta does not have a way to compensate or top up the supply on its own. What you breathe in is what your baby gets.
"The amount of oxygen your baby receives directly reflects the oxygen level in your blood. The placenta cannot compensate on its own."
Every breath fuels his brain, heart, and nervous system
Right now, your baby's brain is forming millions of connections every single day. His heart is developing. His nervous system is being wired. All of this requires oxygen — continuously, around the clock.
Studies measuring oxygen in umbilical cord blood show that fetal oxygen levels increase in the final weeks of pregnancy — a window when your breathing health matters most.
📄 Source — Frontiers in MedicineWithout PosturAir™ vs. With PosturAir™
Without support
Spine curls forward → ribcage closes → diaphragm can't move freely → shallow breaths → less oxygen for baby
How PosturAir™ works
Two bands gently realign your spine → ribcage opens → diaphragm moves freely → deeper breaths → richer blood oxygen
The result for your baby
More oxygen crossing the placenta — to his brain, heart, and nervous system — all day, every day
Four things oxygen is building
inside your baby right now
Oxygen isn't one benefit — it's the fuel for four different systems, all growing at the same time, all depending on what you provide.
His brain
Your baby's brain forms around 250,000 new neurons every minute during pregnancy. This is one of the most oxygen-hungry processes in nature. Better oxygen supports the quality of those connections — the foundation of his thinking, memory, and learning.
Neurogenesis peaks in the 3rd trimesterHis heart
The fetal heart spends all of pregnancy learning to regulate itself. Oxygen fuels cardiac muscle growth and helps establish the heart rhythm patterns that are markers of cardiovascular health — at birth, and for life.
Heart rate variability develops in uteroHis nervous system
Reflexes, motor skills, and sensory processing are all being built in fine detail throughout the second and third trimester. The nerve insulation that makes signals travel fast requires oxygen to form — and it can't be rebuilt after birth.
Myelination begins in utero — oxygen-dependentHis movement & wellbeing
Better oxygen is linked to more fetal movement, fetal breathing movements, and healthy heart rate variability — all recognised signs of a baby who is doing well. Those kicks you feel? They mean his nervous system is working beautifully.
Fetal movement increases with better oxygenationHow PosturAir™ actually works — simply explained
Regular maternity leggings support your bump. That's useful — but it's not the same as correcting the postural chain that leads to shallow breathing. PosturAir™ was built around a completely different goal.
Two bands. Two problems. One solution.
Not one generic panel — two separate bands, each targeting a specific point in the chain.
Lumbar Realignment Band
This band gently supports your lower spine — the part that over-curves as your bump grows and pulls your weight forward. By guiding the spine back into its natural position, it allows your ribcage to lift and your diaphragm to breathe freely again.
Sacral Stabilisation Band
As the uterus grows heavier, the pelvis tips forward — which makes the lower back problem worse. This band stabilises the pelvis at the base, giving the whole postural system a solid foundation to work from.
The simple result: when both bands work together, your diaphragm is freed from the posture-related pressure. You breathe more deeply — automatically, without thinking about it. You just wear them, and it works.
PosturAir™ vs. regular maternity leggings
The starting question is different — and it shows in the design.
Things you're right to wonder about
We'd rather answer the hard questions than pretend they don't exist. Here are the most common ones — answered honestly.
Every source, clearly listed
Every physiological claim on this page is based on peer-reviewed, publicly available research. These links take you directly to the original papers — so you can read them yourself.
Documents the 5 cm upward diaphragm displacement during pregnancy and its effects on lung volumes.
→ Read on PubMed Central
Longitudinal study tracking diaphragmatic changes and breathing patterns across all three trimesters.
→ Read on PubMed
Documents the 14–27% reduction in functional residual capacity in the third trimester.
→ Read on PubMed Central
Foundational review of how fetal oxygen supply depends directly on maternal blood oxygen levels.
→ Read on PubMed
Examines how maternal oxygen availability shapes placental gas exchange in the final trimester.
→ Read on PubMed Central
Documents the progressive increase in fetal oxygen levels from week 37 to week 41 of gestation.
→ Read on PubMed Central
Shows that posture measurably affects breathing capacity during pregnancy.
→ Read on PubMed
You can't give him everything.
But you can give him every breath.
PosturAir™ is the only maternity legging designed around the oxygen your baby needs — not just the comfort you deserve.
Shop PosturAir™ Leggings* PosturAir™ is a wellness product, not a medical device. It is not intended to diagnose, treat, cure, or prevent any medical condition. Always consult your midwife or OB-GYN before use. Scientific references are independent peer-reviewed research and do not constitute endorsement of this product.