Your London clinic has given you a start date, a medication schedule and, somewhere in the leaflet, a line about eating well and cutting back on alcohol. That's usually where the nutrition advice ends. Meanwhile real life carries on: a meal deal at your desk, a flat white on the way in, drinks on a Friday, a takeaway when you get home late. Does any of it actually matter for IVF? Some of it does, some of it matters less than social media suggests, and very little of it gets explained in a ten-minute appointment. Nutrition can't replace IVF, but it's one of the few parts of treatment you and your partner genuinely control.
Before you read on: take the Health Hatch Fertility Assessment to get your Fertility Assessment Score and see which factors below matter most for you.
Quick Answer
An IVF nutritionist in London helps you prepare for treatment by adapting everyday British eating habits to what the evidence supports: a healthy weight range, steadier blood sugar, more fibre and whole foods, less alcohol, and correcting common UK gaps in vitamin D, iodine and folate. No diet guarantees IVF success, but these factors are associated with better reproductive health and may help both partners go into treatment in better condition.
In This Article
- Why does nutrition matter for IVF in the UK?
- Which everyday British habits can work against IVF preparation?
- Does weight matter for IVF, and what about NHS BMI limits?
- How can diet support hormones before IVF?
- What does an IVF-friendly week look like in London?
- What should you focus on at each stage of IVF?
- Why does the male partner's diet matter?
- How has Health Hatch supported couples preparing for IVF?
- How can Conceive Together support your IVF journey?
- FAQs
Why Does Nutrition Matter for IVF in the UK?
According to the Human Fertilisation and Embryology Authority (HFEA), the average IVF birth rate per embryo transferred in the UK was 30% in 2024, ranging from 38% for patients aged 18–34 to 8% for those aged 43–44. The average age of patients starting IVF is now around 35.
Age is the single biggest factor in IVF outcomes, and nothing on your plate changes it. That's exactly why the modifiable factors deserve attention. NICE's fertility guidance highlights several that both partners can work on before treatment:
- Body weight, for both women and men
- Alcohol and smoking
- Folic acid and other key nutrients
- Overall diet and physical activity
There's also a practical reason this matters in the UK. The HFEA reports that only 28% of IVF cycles were NHS-funded in 2024, so most couples are paying privately. When each cycle represents a significant financial and emotional investment, arriving at it as well-prepared as possible makes sense.
Practical takeaway: You can't control your age or your clinic's protocol, but you can influence the metabolic and nutritional health you bring into each cycle.
Which Everyday British Habits Can Work Against IVF Preparation?
None of these habits are "bad" on their own. The issue is how they add up over the roughly three months that eggs and sperm take to mature.
| Everyday habit | Why it matters | A realistic swap |
|---|---|---|
| Meal deal sandwich, crisps and a fizzy drink | Mostly refined carbs, with little fibre or protein. Only around 4% of UK adults reach the recommended 30g of fibre a day | A protein-led option (chicken, egg, tuna or bean salad), fruit or nuts instead of crisps, water to drink |
| Cereal or toast on the way to the Tube | Fast-digesting carbs and little protein, often followed by a mid-morning slump | Porridge with Greek yoghurt and berries, eggs on wholegrain toast, or overnight oats with seeds |
| After-work drinks and weekend wine | Alcohol affects fertility in both partners, and the UK Chief Medical Officers advise not drinking at all when trying to conceive | Alcohol-free options for her; for him, staying within limits spread across the week |
| Oat, almond or rice milk in every coffee | Most plant milks aren't fortified with iodine, and UK women of childbearing age are now classed as mildly iodine deficient | An iodine-fortified plant milk, some dairy, or fish in the week |
| Grey October to March | UK sunlight is too weak for your skin to make vitamin D in autumn and winter | The NHS advises everyone to consider 10 micrograms of vitamin D daily in these months |
| Late takeaways after a long commute | One analysis of UK national survey data found ultra-processed foods made up over half of daily calories | Batch-cooked freezer meals and quick "assembly" dinners |
The iodine point surprises most of our UK clients. Unlike many countries, the UK never introduced iodised salt, so milk and dairy have quietly been the main source. Iodine is essential for thyroid hormone production, and thyroid function matters for conception and early pregnancy. If you've switched to plant milk, it's worth checking the label.
Practical takeaway: Small, repeatable swaps at breakfast, lunch and in your coffee order usually matter more than a dramatic overhaul.
Does Weight Matter for IVF, and What About NHS BMI Limits?
Yes, for both partners. NICE advises that a woman's BMI should ideally be between 19 and 30 before assisted reproduction, and that a BMI outside this range is likely to reduce the chance of success. Most NHS Integrated Care Boards in England use the same 19–30 range as a condition for funding IVF. For men, NICE notes that a BMI of 30 or above is linked to a higher risk of reduced fertility.
This is relevant to a lot of couples: the Health Survey for England found that 64% of adults in England were overweight or living with obesity in 2022.
A few things worth knowing:
- Crash diets before a cycle aren't the answer. Very restrictive eating can leave you short of protein and micronutrients just when you need them, and it's hard to sustain through treatment.
- Support works better than advice alone. NICE notes that a group programme combining exercise and dietary advice leads to more pregnancies than weight-loss advice on its own.
- Being underweight matters too. A BMI below 19 can affect ovulation, and it's often overlooked.
- Weight-loss injections need planning. The MHRA advises that GLP-1 medicines such as semaglutide and tirzepatide shouldn't be used while trying to conceive. Semaglutide should be stopped at least two months beforehand, and tirzepatide at least one month. Plan the timing with your prescriber and clinic.
Practical takeaway: Gradual, supported changes to weight and body composition are more realistic, and more nutritionally safe, than a last-minute diet before your cycle.
How Can Diet Support Hormones Before IVF?
Eggs and sperm take roughly three months to mature, so the 90 days before a cycle matter most. The aim is to improve the hormonal and metabolic conditions they develop in.
| Hormonal / metabolic factor | Why it matters for IVF | Where nutrition may help |
|---|---|---|
| Insulin and blood sugar | High insulin can raise androgens and disrupt ovulation, particularly in PCOS | Protein at every meal, fibre-rich carbs, fewer sugary drinks and refined snacks |
| Thyroid function | Untreated dysfunction is linked to lower conception rates and higher miscarriage risk | Adequate iodine (dairy, fish, fortified plant milk); correct medication timing around food |
| Inflammation and oxidative stress | May affect egg and sperm quality | Vegetables, pulses, nuts, seeds, oily fish; fewer ultra-processed foods |
| Vitamin D, folate, iron, B12 | Common gaps relevant to conception | Food first, plus testing-led supplements |
The strongest dietary evidence for IVF comes from Mediterranean-style eating patterns. A 2023 meta-analysis found higher adherence was associated with better pregnancy and live birth rates in assisted reproduction, though the evidence is still preliminary.
This is a pattern, not a holiday menu. You don't need to live on Greek salads. In a British kitchen it looks like porridge oats, wholegrain bread, beans and lentils, plenty of vegetables, a handful of nuts, rapeseed or olive oil, and salmon, mackerel or sardines once or twice a week.
Lifestyle sits alongside this: regular movement, 7–8 hours of sleep, and stopping smoking and vaping, in line with NICE fertility guidance. For many London couples, long hours and late dinners mean meal timing needs as much attention as meal content.
What Does an IVF-Friendly Week Look Like in London?
You don't need a new cookbook. Most of the time you need to rebalance familiar meals so each one has a protein, a fibre-rich carb and plenty of vegetables.
Simple weeknight meals that work:
- Traybake: salmon or chicken thighs with peppers, red onion, chickpeas and new potatoes, all on one tray
- Jacket potato: topped with tuna and sweetcorn, or a bean chilli, with a side salad
- Lentil bolognese: half mince, half lentils, over wholewheat pasta
- Soup and bread: a batch of lentil and vegetable soup with wholegrain bread and some cheese or hummus
Weekend adjustments, not restrictions:
- Sunday roast: keep the roast, fill half the plate with vegetables, and go lighter on the roast potatoes and Yorkshire puddings
- Friday takeaway: choose grilled or tandoori-style dishes with vegetables, and share the sides
Your meals also have to fit your schedule. If a plan means cooking from scratch after a 7pm finish, it won't survive a stressful IVF cycle. The best plan is batch-cooked, quick to assemble and built from what's already on your usual Tesco, Sainsbury's, Waitrose or Ocado shop.
Practical takeaway: Aim for protein at every meal, more fibre and more colour, in meals simple enough to make on a busy weekday.
What Should You Focus On at Each Stage of IVF?
Your nutrition priorities shift as treatment moves along.
| IVF stage | Nutrition focus |
|---|---|
| 3 months before | Both partners improve diet quality and reduce alcohol; she starts folic acid; test and correct vitamin D, iron, B12 and thyroid |
| Ovarian stimulation | Enough protein and fluids; small, regular meals if you feel bloated |
| Egg retrieval | Hydration and easy meals for recovery, such as soups, porridge and scrambled eggs |
| Embryo transfer and two-week wait | Steady meals and food safety: avoid liver and pâté, unpasteurised products, and shark, swordfish and marlin; keep caffeine under 200mg a day |
The NHS recommends 400 micrograms of folic acid daily from when you start trying until 12 weeks of pregnancy, and some women are prescribed a higher dose. From December 2026, non-wholemeal wheat flour in the UK must be fortified with folic acid, but the government is clear this supports supplementation rather than replacing it. Check any supplement with your fertility clinic first.
Why Does the Male Partner's Diet Matter?
Male factor contributes to a significant share of infertility, and even IVF with ICSI depends on the sperm used. Systematic reviews associate diets rich in vegetables, fruit, fish, whole grains and nuts with better semen quality, and processed meat, sugary drinks and heavy alcohol with poorer parameters.
Alcohol is where British habits matter most for men. NICE says excessive drinking harms semen quality, while staying within 14 units a week, spread across several days, is unlikely to affect it. A big Saturday session isn't the same as the same units spread through the week.
That's why we believe both partners should prepare together.
What nutrition can't do: guarantee IVF success, or reliably raise AMH or ovarian reserve. What it can do is support the metabolic and nutritional health you both bring into treatment.
How Has Health Hatch Supported Couples Preparing for IVF?
Over more than a decade and 10,000+ clients in 60+ countries, we've seen a consistent pattern. Couples who spend two to three months correcting what's modifiable tend to go into treatment in better shape: steadier blood sugar, corrected vitamin D and iodine intake, a healthier body composition, less alcohol, and a male partner who is preparing too.
A few examples from our clinical experience:
- Male factor: one male partner's sperm concentration improved from around 11 to 17 million/mL over three months while he worked on nutrition and lifestyle alongside his medical care.
- Low AMH and teratozoospermia: we worked with a couple where she had low AMH and he had a high proportion of abnormally shaped sperm. They later conceived naturally.
- Egg freezing at 42 with PCOS: one client froze around 15–18 eggs after working with us on her metabolic health and nutrition before her cycle.
These are individual client experiences, not evidence that nutrition alone caused the result. Every couple's diagnosis, age and clinic protocol is different, and outcomes depend on many factors beyond nutrition.
How Does Health Hatch Support Couples in the UK?
Generic advice rarely accounts for how you actually live. Health Hatch's qualified dietitians have 13+ years of clinical experience, and we build plans around your reports, your food and your routine.
- A plan built around you: omnivore, pescatarian, vegetarian or vegan, your likes and dislikes, your working hours and your commute.
- A grocery list based on UK stores: foods you can find at Tesco, Sainsbury's, Waitrose, Lidl, M&S or Ocado, so the plan is easy to follow.
- Blood report review (vitamin D, B12, ferritin, thyroid, HbA1c) alongside your clinic's plan.
- Online consultations scheduled around UK working hours.
We work alongside your fertility consultant, never in place of them.
How Can Conceive Together Support Your IVF Journey?
Our most popular programme for couples preparing for IVF is Conceive Together (£699 for 3 months): one plan, both partners, one goal. IVF outcomes depend on both the egg and the sperm, and both take about three months to develop, so the programme prepares you together over that same window.
| What's included | How it supports your IVF preparation |
|---|---|
| 2 joint calls a month with a co-founder and dietitian | Both partners are coached together and stay on the same page through the cycle |
| 6 cycle-synced plans for her | Meals matched to her cycle and treatment stage, built to support blood sugar and hormonal balance |
| 6 sperm-optimisation plans for him | Targets the diet and lifestyle factors associated with semen quality |
| Hormonal lab report review for both | Deficiencies and metabolic markers are picked up and addressed before the cycle |
| Supplement protocol for both | Evidence-based and checked against your clinic's protocol |
| Custom household grocery list | Based on UK stores, so one shop works for both of you |
| 80+ couple-friendly recipes and WhatsApp support | Quick, practical meals and day-to-day help when questions come up |
Conceive Together can't guarantee IVF success, and nothing can. What it does is help both of you correct the modifiable factors linked to better treatment outcomes, in a way that fits your London life.
Looking for support for just one partner, or a monthly option? Compare all fertility programmes and UK pricing.
FAQs
Do I need an IVF nutritionist if my clinic already gives diet advice?
Not always, but it often helps. Clinic advice is usually brief and general. An IVF nutritionist turns your blood results, eating habits, working hours and any conditions such as PCOS or thyroid disease into a daily plan built around the food you actually eat.
Can diet improve IVF success rates?
No diet can guarantee IVF success. Research associates Mediterranean-style eating, a BMI in the healthy range and adequate folate and vitamin D with better reproductive outcomes, but these are associations rather than proof. Diet works best as preparation that supports your medical treatment, not as a substitute for it.
How long before IVF should we change our diet?
Ideally about three months before your cycle, since eggs and sperm take roughly 90 days to mature. Shorter preparation still helps, particularly for reducing alcohol, improving blood sugar and correcting deficiencies such as vitamin D.
Do I need to stop drinking alcohol before IVF?
For women, the UK Chief Medical Officers advise that the safest approach when trying to conceive is not to drink at all. For men, NICE says staying within 14 units a week, spread across several days, is unlikely to affect semen quality, while heavy drinking is harmful. Many couples find it easier to cut back together.
Should I take vitamin D before IVF in the UK?
The NHS advises everyone in the UK to consider 10 micrograms of vitamin D a day in autumn and winter, when sunlight is too weak for the skin to make enough. Some people need it all year. Ask your GP or clinic to test your level so any supplement is based on your result.
Is oat milk okay when trying to conceive?
Yes, but check the label. Most plant milks in the UK aren't fortified with iodine, and cows' milk is the main dietary source for most people here. If you drink plant milk, choose one fortified with iodine, or make sure dairy or fish feature elsewhere in your week.
Can Health Hatch work with my London fertility clinic?
Yes. We work alongside your consultant's treatment plan, never in place of it. Consultations are online, so couples anywhere in London or the UK can join, and we review your clinic's blood results as part of your plan.
Ready to Prepare for IVF With a Plan That Fits Your Life?
IVF asks a lot of you, physically, emotionally and financially. A plan built around your London routine, your food and your blood results puts you in control of the part you can influence.
Start with your Fertility Assessment Score. Take the Health Hatch Fertility Assessment to find out which nutrition and lifestyle factors may matter most for you before IVF. Our fertility nutrition team will then help you work out whether Conceive Together is the right next step for you as a couple.
References
- Human Fertilisation and Embryology Authority. Fertility treatment 2024: trends and figures (2026). hfea.gov.uk
- National Institute for Health and Care Excellence. Fertility problems: assessment and treatment (NG257, 2026).
- Department of Health and Social Care. NHS-funded in vitro fertilisation (IVF) in England (2025). gov.uk
- NHS England Digital. Health Survey for England 2022, Part 2: Adult overweight and obesity (2024).
- Medicines and Healthcare products Regulatory Agency. Guidance on GLP-1 medicines, contraception and pregnancy (June 2025).
- UK Chief Medical Officers. Low risk drinking guidelines (2016).
- NHS. Vitamin D, and Planning your pregnancy (folic acid guidance). nhs.uk
- Food Standards Agency. Folic acid: fortification of flour. food.gov.uk
- Iodine deficiency in the UK: should we take it with a pinch of salt? Narrative review (2026). PubMed ID 41501008.
- Iodine fortification of plant-based dairy and fish alternatives: the effect of substitution on iodine intake based on a market survey in the UK. British Journal of Nutrition. 2022.
- Rauber F, et al. Ultra-processed food consumption and chronic non-communicable diseases-related dietary nutrient profile in the UK (2008–2014). Nutrients. 2018;10(5):587.
- The Food Foundation. UK still failing to meet basic dietary guidelines (analysis of National Diet and Nutrition Survey 2019–2023).
- Winter HG, et al. Can dietary patterns impact fertility outcomes? A systematic review and meta-analysis. Nutrients. 2023;15(11):2589.
- Karayiannis D, et al. Adherence to the Mediterranean diet and IVF success rate among non-obese women attempting fertility. Human Reproduction. 2018;33(3):494–502.
- Salas-Huetos A, et al. Dietary patterns, foods and nutrients in male fertility parameters and fecundability: a systematic review of observational studies. Human Reproduction Update. 2017;23(4):371–389.