In this article
This article is general information, not a diagnosis. New, persistent or concerning symptoms should be discussed with your GP or an appropriate healthcare professional.
There is an honest version of this question and a dishonest one. The dishonest version asks whether you can guarantee nothing will ever change, and the answer to that is no, from anyone, at any price. The honest version is narrower and far more useful: which specific things have been tested, against which outcomes, and what did they show?
That question has answers, and several are genuinely encouraging. Some of the most confidently marketed prevention advice, meanwhile, has never been tested at all. What follows separates the two.
What you are actually trying to prevent
Vaginal laxity is the sensation of looseness or reduced tightness, and it has identifiable mechanical drivers. Vaginal childbirth is the largest: compared with women who have never given birth, the adjusted odds of reporting laxity are 2.62 times higher after one vaginal birth and 7.14 times higher after more than one. Menopause raises them independently, with adjusted odds of 2.23. Inherited connective tissue matters too, and pressure from constipation, a chronic cough or extra weight accumulates over years.
Here is the first honest caveat, and it shapes everything below. Almost none of the prevention research measures laxity itself. The trials count urinary incontinence, perineal trauma, episiotomy and prolapse, because those can be observed and recorded, whereas laxity is something a woman reports. So the evidence below protects the pelvic floor as a system, and laxity sits inside that system rather than being the thing that got counted.
What you can change, and what you cannot
NICE guideline NG210 is unusually direct about this, and splits pelvic floor risk factors into two lists.
| Modifiable | Non-modifiable |
|---|---|
| BMI over 25 | Increasing age |
| Smoking | Family history of urinary or faecal incontinence, or overactive bladder |
| Lack of exercise | Gynaecological cancer, its treatment, or surgery such as hysterectomy |
| Constipation | Fibromyalgia |
| Diabetes | Chronic respiratory disease or long-term cough |
Alongside those, NICE lists factors specific to pregnancy and labour: a first birth after the age of 30, having given birth before, an assisted vaginal birth using forceps or vacuum, an occipito-posterior position, a second stage lasting more than an hour, and anal sphincter injury. Almost none of those are choices either.
Genetics belong firmly in the right-hand column. Twin studies attribute around 40 percent of the variation in pelvic support to inherited factors, and a family history of prolapse carries a 2.3 to 2.7-fold increased risk. A meaningful share of your risk was settled before you were born.
Then there is the gap. RCOG notes that although the 2021 NICE evidence review identified these factors, there is still no national guidance on which women are at greatest risk, or on which interventions reduce that risk, and it is asking policymakers to close that. So nobody currently has a validated way to calculate your personal risk. Anyone offering you one has gone past the evidence.
Why prevention so rarely happens
RCOG-commissioned polling found that 88 percent of UK women know what the pelvic floor is. Yet 24 percent have never done a pelvic floor exercise, rising to 29 percent among women aged 18 to 34, and 69 percent have never had an NHS professional talk to them about it.
Read those three together. The knowledge is there and the conversation is not. What is missing is not anatomy but the thing most likely to prompt action: a clinician raising it directly, which happens to fewer than a third of women.
What the evidence genuinely supports
Physical activity, weight and everyday pressure
NICE recommendation 1.3.1 is short: advise women that physical activity and a healthy diet can help prevent pelvic floor dysfunction. Underneath it sit the UK Chief Medical Officers’ physical activity guidelines, adequate fibre and fluid intake, weight management, and smoking cessation support.
The weight component carries the most data. A systematic review of 22 studies and more than 95,000 participants found risk ratios for prolapse of 1.36 to 1.40 in overweight women (BMI 25 to 30) and 1.47 to 1.61 above a BMI of 30. UK Biobank data on 251,143 women found central weight around the abdomen associated with a 48 percent higher risk of prolapse, independent of BMI. NICE advises that weight loss can help urinary incontinence, overactive bladder and prolapse where BMI is over 30.
Fibre and fluid sound mundane, but the logic is mechanical. Constipation is associated with prolapse (odds ratio 1.77), as is persistent cough (1.52). Both raise abdominal pressure repeatedly, over years.
Be clear about the status of this, though. It is guideline advice built on association, not a trial in which women were randomised to a diet and their pelvic floors compared a decade later. It is weaker evidence than what comes next.
Pelvic floor muscle training, and the caveat nobody quotes
NICE recommends that all women do pelvic floor muscle training throughout life, and that a supervised three month programme from week 20 of pregnancy is considered for women with specific risk factors.
The prevention evidence is good. A Cochrane review found that pelvic floor muscle training reduced urinary incontinence in late pregnancy (risk ratio 0.38) and in the early postpartum period (risk ratio 0.38, rated high-certainty evidence). That is roughly a 60 percent reduction in the risk of leaking.
Now the part that never makes the leaflet. The same review found no clear benefit beyond 6 to 12 months, and no evidence that pelvic floor training prevents faecal incontinence at any timepoint at all.
Both deserve stating plainly. The first means this is not a course you complete: the preventive effect appears to depend on continuing, so it is a lifelong habit or it is very little. The second means that if you have been told these exercises protect bowel continence, that claim currently has no trial evidence behind it.
Technique decides whether any of it applies to you. It is a squeeze and lift, never a strain or a bear down. More than 30 percent of women with incontinence cannot contract the muscles correctly at a first consultation. The correction is fast: among 382 postpartum women, verbal feedback alone cut the error rate from 57 percent to 3 percent.
Antenatal perineal massage
This one is specific, free and has a Cochrane review behind it. Across 4 trials and 2,497 women, digital perineal massage from around 35 weeks of pregnancy reduced perineal trauma requiring suturing (risk ratio 0.91) and episiotomy (risk ratio 0.84). The benefit was clearest for women having a first vaginal birth.
Read the size of the effect as well as its direction. Roughly one woman in every 15 who does it avoids trauma that would have needed stitches, and one in 21 avoids an episiotomy. Real, modest, and about the perineum rather than laxity.
Prevention and treatment are three different claims
This is where most of the misleading content in the field lives. There are three claims here, not one, and they carry three different weights of evidence.
Preventing incontinence around childbirth with pelvic floor training has the good evidence described above. Treating incontinence that has already established itself after a birth has notably weaker evidence than that. And treating established stress urinary incontinence in the general population has the strongest evidence in this whole field: a Cochrane review of 31 trials and 1,817 women found women doing pelvic floor training eight times more likely to report cure than women doing nothing, 56 percent against 6 percent. NICE recommends supervised training for at least 3 months for stress or mixed incontinence, and at least 4 months for symptomatic prolapse.
When those three are flattened into a single claim that pelvic floor exercises work, something is being sold.
What does not have the evidence behind it
Two things need saying without hedging.
Collagen supplements. No peer-reviewed randomised controlled trial evidence was found linking dietary or collagen supplementation to the prevention of vaginal laxity. NICE’s dietary advice is general: fibre, fluids and a healthy weight. It is not collagen-specific, and NICE cites no evidence for collagen supplementation as a preventive measure. That is not a claim that supplements fail. It is that the trial has not been run, and until it is, marketing collagen as pelvic floor prevention presents a hypothesis as a result.
Devices that promise to do the training for you. A Cochrane review of 63 trials and 4,920 women found that adding a resistance device probably adds no benefit over pelvic floor muscle training alone, and recorded adverse events in 6 percent of women, almost all related to intravaginal devices. What did help was training the muscle directly, and more contact with a clinician.
Where to start
Before anything else, rule things out. Unexplained bleeding, unusual or foul-smelling discharge, pelvic pain, a sensation of heaviness or dragging, persistent incontinence, or an overdue cervical screening all need a GP or gynaecologist rather than a prevention plan. Those can indicate conditions that need diagnosing, and treating them as a lifestyle problem delays care that would help.
After that, the honest shortlist is short. Get your technique checked by someone qualified rather than assuming it from a leaflet, and keep going indefinitely, because the benefit does not bank. Treat constipation and a lingering cough as pelvic floor problems, not nuisances. If you are pregnant, consider perineal massage from around 35 weeks, and ask about a supervised programme from week 20 if any of the NICE risk factors apply to you.
Prevention here means shifting the odds, not earning an outcome. Plenty of women do all of this and still notice change, because age, genetics and the mechanics of a particular birth are not negotiable.
That matters more than any of the numbers. None of this is a list of things you should have done, and nothing on it is owed to anyone.
If you have ruled out the medical causes and want an honest read on where you stand, a consultation at our private clinic is a reasonable next step. Ask our practitioners what the evidence for any given option does and does not show, and expect a straight answer, including the parts that argue against booking anything at all.
A balanced view
Prevention: what the evidence will and will not do for you
What supports it
- NICE names five modifiable risk factors outright, so some of this is genuinely in your hands: BMI over 25, smoking, lack of exercise, constipation and diabetes
- Antenatal perineal massage from around 35 weeks has a Cochrane review behind it, across 4 trials and 2,497 women, reducing perineal trauma needing stitches and episiotomy, with the clearest benefit for a first vaginal birth
- Pelvic floor training in pregnancy and early postpartum cut urinary incontinence by roughly 60 percent in Cochrane data, rated high-certainty evidence, from an exercise that costs nothing
Important limitations
- The preventive benefit of pelvic floor training does not bank: Cochrane found no clear benefit beyond 6 to 12 months, and no evidence at all that it prevents faecal incontinence at any timepoint
- Almost none of the prevention research measures laxity itself. The trials count incontinence, perineal trauma and prolapse, so the evidence protects the pelvic floor as a system rather than targeting the sensation of looseness
- A large share of the risk is not modifiable, including age, birth history and genetics, and RCOG says there is still no national guidance on which women are at greatest risk
Questions, answered plainly
Frequently asked questions
Can vaginal laxity actually be prevented?
Partly, and honestly the word to use is reduced rather than prevented. Several named interventions have trial evidence for protecting the pelvic floor: pelvic floor muscle training around pregnancy, antenatal perineal massage, and the lifestyle factors NICE lists as modifiable. What none of them has is a trial showing they prevent the sensation of laxity itself, because that is not the outcome researchers measure. Meanwhile a meaningful share of risk sits in things you cannot change, including age, family history and how a birth actually goes. Prevention here means shifting the odds, not securing an outcome.
Do collagen supplements help prevent vaginal laxity?
There is no peer-reviewed randomised controlled trial evidence linking dietary or collagen supplementation to the prevention of vaginal laxity. NICE's dietary advice for pelvic floor health is general, covering fibre, fluid intake and a healthy weight, and it is not collagen-specific: NICE cites no specific evidence for collagen supplementation as a preventive measure. That is not proof that supplements do nothing. It means the trial has not been done, so anything sold on that basis is presenting a hypothesis as a result.
When should I start pelvic floor exercises if I am pregnant?
NICE recommends that all women do pelvic floor muscle training throughout life, not just around a pregnancy. For women with specific risk factors, NICE says a supervised three month programme from week 20 of pregnancy should be considered, which is a conversation to have with your midwife or GP. The more important point is technique rather than timing. More than 30 percent of women with incontinence cannot contract the muscles correctly at a first consultation, and coaching corrects most of those errors quickly.
Does antenatal perineal massage work?
Yes, modestly, and it is one of the better evidenced things on the list. A Cochrane review of 4 trials and 2,497 women found that digital perineal massage from around 35 weeks of pregnancy reduced perineal trauma requiring stitches (risk ratio 0.91) and episiotomy (risk ratio 0.84), with the benefit clearest for women having a first vaginal birth. In practical terms, roughly one woman in every 15 who does it avoids trauma that would have needed suturing. That is a real effect and a small one, and it concerns the perineum rather than laxity.
I have already given birth. Is it too late?
No, but the claim changes and so does the evidence behind it. Preventing incontinence around childbirth with pelvic floor training has good evidence. Treating incontinence that has already established itself after a birth has notably weaker evidence than that. Treating established stress urinary incontinence in the general population has the strongest evidence in this whole field: 56 percent of women reported cure with training against 6 percent with no treatment. Those are three different questions, and it is worth noticing when someone answers them as though they were one.
Evidence base
Sources and further reading
Selected authoritative and peer-reviewed sources used to inform this article.
