7 Birth Comfort Measures: The History, The Hype & What the Evidence Actually Says
Walk into any birth prep class and someone will mention a rebozo, a TENS machine, a peanut ball, or "just breathe through it." But where did these actually come from — and do they work, or are they just good marketing? Here's the honest, evidence-based breakdown of seven of the most popular comfort measures, so you can decide what's actually worth packing in your bag.
1. The Rebozo
What it is: A long, woven shawl used to support, sway, or "sift" a labouring body — wrapped around the belly or hips and rocked gently by a partner or doula.
History: Rooted in pre-Columbian Mesoamerica, the rebozo has been used by traditional Mexican midwives (parteras) for generations to help position babies and ease discomfort, passed down midwife to midwife long before reaching an international audience through workshops.
Evidence: Limited but promising — used by fewer than 2% of women planning vaginal birth, but the trials that exist found the technique may reduce perceived labour pain and improve overall birth experience.
Verdict: Cheap, culturally rich, zero downside. Easy yes.
2. TENS Machines
What it is: A small device sending mild electrical pulses through pads on your lower back, designed to interrupt pain signals.
History: Born from real science — the 1965 Gate Control Theory of Pain (Melzack & Wall) led neurosurgeon Norman Shealy to build the first modern TENS device in 1967, with commercial units hitting the market by 1970.
Evidence: A major Cochrane review found pain scores were broadly similar between TENS users and non-users, though women using it on acupuncture points were less likely to rate pain as severe — and most women said they'd use it again regardless of the pain-score data.
Verdict: Won't numb you like an epidural, but gives you something to control and focus on. Worth having.
3. The Birth Comb
What it is: A comb gripped teeth-first into the palm and squeezed through contractions.
History: No centuries-old tradition here — this one went viral after a UK maternity unit's 2023 Instagram post, racking up hundreds of thousands of views on TikTok and X.
Evidence: Fact-checkers have rated the specific pain-reduction claim as unsubstantiated. Real acupressure does have a modest evidence base for labour pain relief, but the comb itself hasn't been directly studied.
Verdict: Fine as a free distraction tool — just don't market it as clinically proven, because it isn't.
4. Hypnobirthing
What it is: A structured method using relaxation, visualisation, and self-hypnosis to reduce fear and tension in labour.
History: Building on Grantly Dick-Read's "fear-tension-pain" theory and Fernand Lamaze's 1950s breathing methods, hypnotherapist Marie Mongan published HypnoBirthing: The Mongan Method in 1992 and founded the HypnoBirthing Institute in 2000.
Evidence: A 2016 Cochrane review found hypnosis users were less likely to need pharmacological pain relief — a real, measurable effect — but found no clear difference in coping or vaginal birth rates, and rated overall evidence quality as low.
Verdict: Not proven to deliver a "pain-free" birth, but calmer and less afraid is rarely a bad place to labour from.
5. The Birth Ball
What it is: A large inflatable ball for sitting, rocking, or leaning through contractions.
History: Originally physiotherapy kit from the 1960s, adapted specifically for labour in the 1980s by childbirth educators Paulina Perez and Penny Simkin.
Evidence: A meta-analysis found a statistically significant reduction in labour pain scores among birth ball users, plus a shorter active labour phase — though no measurable effect on mode of delivery. Satisfaction ratings regularly top 90%.
Verdict: Low-cost, genuinely evidence-backed, doubles as a pregnancy chair. Easy yes.
6. The Peanut Ball
What it is: A peanut-shaped ball placed between the legs while lying on your side — built specifically for women with an epidural who can't move freely.
History: Adapted from general physical therapy equipment within the last couple of decades, purpose-built to solve the "epidural limits your positions" problem.
Evidence: One of the strongest evidence bases on this list — a 2024 meta-analysis found peanut ball use shortened first-stage labour by an average of 87 minutes in women with epidurals, and separate research found it roughly halved C-section likelihood in that group. (Not every review agrees on exact numbers, but the overall direction is consistent.)
Verdict: If an epidural is on the table for you, this might be the single most worthwhile item on this whole list.
7. Birth Pools & Water Immersion
What it is: Labouring — and sometimes birthing — in warm water.
History: Water immersion for relief dates back to ancient civilisations, but modern waterbirth traces to Russian boat builder Igor Tjarkovsky in 1970s Soviet Russia, later popularised across Europe by French obstetrician Michel Odent.
Evidence: A Cochrane review found water immersion significantly reduces the need for epidural or spinal pain relief without negatively affecting labour length or newborn wellbeing — strong enough that NICE now recommends offering it to all healthy, low-risk women. A 2025 study of over 70,000 women found it as safe as birth on land.
Verdict: The strongest "old wisdom, now backed by NICE" story on this list.
The Honest Doula Takeaway
None of these are magic switches. What the research consistently shows is that feeling supported, in control, and able to move your body tends to matter more than which specific tool you're holding. Think of this list less as pain relief rankings and more as options to build your own toolkit — mix, match, and see what actually helps you feel grounded.