17 Feb How To Avoid IVF Weight Gain

Are you concerned about weight gain during your IVF journey? You’re not alone. Many women notice their body changing before, during, and after fertility treatment, and this can feel unsettling on top of everything else IVF involves. Hormone medications, stress, disrupted routines, and emotional eating can all contribute to gradual weight gain that’s hard to shift. This comprehensive guide explains why IVF can impact your weight, how to prevent excessive gain without extreme dieting, and gentle, evidence-based methods to lose weight after IVF. You’ll discover practical nutrition strategies, movement tips that support your hormones, and mindset tools to help you feel more in control. Whether you’re preparing for IVF, in the middle of a cycle, or recovering afterwards, this article will help you support your health, protect your wellbeing, and feel your best at every stage.

We hope there’s some information in this article that can help you, but we’d love to help you in person, too. We are a team of qualified, experienced nutritionists who specialise in weight loss. We work with clients at various stages of IVF treatment to support them in managing their weight around fertility treatment. If you’d like to find out how we can support you with personalised recommendations and professional support, book in for a complimentary call.

DOES IVF CAUSE WEIGHT GAIN?

In short: yes. Many women experience weight gain while they are going through IVF, and it can often be hard to lose. So why does it happen? While some studies suggest that IVF weight gain is a myth, many women we work would disagree. One case study of a 33-year-old woman undergoing IVF revealed significant weight gain (13-15 pounds) during each controlled ovarian stimulation cycle. The study suggests IVF medications may alter metabolic pathways, causing rapid weight gain.

Another study of 734 women undergoing IVF found a statistically significant but clinically minor weight gain (average 387.7g) during controlled ovarian stimulation. The weight gain correlated positively with the number of oocytes retrieved but not with the stimulation protocol. 

WHY DOES IVF CAUSE WEIGHT GAIN?

There are several factors related to the IVF process that can cause weight gain. These are the main three.

IVF HORMONES CAN IMPACT WEIGHT

During an IVF cycle, women are given medications to stimulate the ovaries to produce multiple eggs. These medications cause hormonal changes that can lead to fluid retention and weight gain. IVF hormones can cause weight gain in a number of different ways. Hormones such as progesterone can increase appetite, leading to overeating and weight gain. Hormonal changes can also alter the body’s metabolism, leading to weight gain. For example, insulin resistance can develop, which can lead to an increase in fat storage. Some studies suggest that the hormones used during IVF can cause an increase in fat accumulation, particularly in the abdominal area. Hormonal changes can also lead to an increase in fluid retention, which can cause temporary weight gain.

Weight gain during IVF is not inevitable, and there are steps you can take to minimise the risk which we’ll discuss later on.

STRESS AND EMOTIONAL EATING

Whether your IVF cycle resulted in pregnancy or not, many women notice that their body feels different afterwards and that weight is harder to manage than before treatment. Hormonal shifts, disrupted routines, emotional exhaustion, and changes to sleep and movement patterns can all make it feel as though your body is “working against you”, even once the injections have stopped.

If treatment has not been successful, it is completely understandable to feel low, anxious, or detached from your body for a while. In this context, strict diet rules or punishing exercise regimes rarely help, and can even prolong the cycle of “falling off the wagon” and feeling guilty. A more compassionate, structured approach that supports your metabolism, mood, and hormones tends to deliver better long‑term results.

IVF can be a stressful and emotional process and it’s not uncommon to turn to food for comfort. Physiologically, stress causes the body to release cortisol, a hormone that can promote weight gain, particularly around the middle. For a more in-depth look at the relationship between stress and weight gain, as well as how to overcome it, take a look at our article: How Stress Causes Weight Gain And Ways To Tackle It

LIFESTYLE CHANGES

Many women undergoing IVF are advised to reduce their physical activity or avoid certain exercises. Not only does this lead to a decrease in calorie burn, it also means less feel-good endorphins. If you aren’t feeling the buzz from a workout, you may find yourself reaching for food to boost your mood.

TIPS TO AVOID GAINING WEIGHT DURING IVF

While weight gain is a possible side effect there are proactive steps you can take to minimise your risk of gaining weight during treatment.

GET ENOUGH SLEEP

It’s not widely discussed, but lack of sleep can have a significant impact on our weight management. Sleep deprivation negatively impacts the hormones that regulate our appetite and satiety meaning we are more likely to overeat when tired. Prioritise sleep and aim for eight to nine hours every night. You can explore the link between sleep and weight gain and find effective tips for improving your sleep in our article: ‘Is Poor Sleep Sabotaging Your Weight Loss?’.

MAINTAIN A HEALTHY DIET

Eating a healthy, balanced diet can help you manage your weight during IVF. Avoid processed foods and base your diet on whole, nutrient dense and ideally organic food. Here’s our guide detailing how to structure a balanced meal. Creating balanced, satisfying meals can help minimise the likelihood of turning to sugary or starchy snacks as a result of blood sugar dips. Keeping a food diary on an app like MyFitnessPal can increase your awareness of habits that may not be supporting you.

STAY ACTIVE

Regular exercise not only helps regulate blood sugar levels, it can also help you manage stress during the IVF process. However, it is important to follow your IVF clinic’s advice regarding which types of exercise are recommended during IVF.

STAY HYDRATED

Drinking plenty of water can help excrete excess fluids from your body. If you’re filtering your water, it’s a good idea to add electrolytes back in which are vital for hydration. We recommend Elete.

MANAGE STRESS

IVF can be a stressful process, and stress can lead to emotional eating and weight gain. Practice stress management techniques such as meditation, yoga, or deep breathing. Getting into the habit of just 10-15 minutes first thing in the morning can make a noticeable difference to stress levels. Not sure where to start? Try this daily Isha Kriya meditation from Sadhguru.

AVOID CAFFEINE & ALCOHOL

You may well have been advised to avoid caffeine and alcohol by your IVF provider given their potential to compromise fertility. They can also stimulate the release of the stress hormone cortisol which is linked to abdominal weight gain (AKA ‘belly fat‘). Minimise or ideally avoid consuming both during your IVF treatment

CONSULT AN EXPERT

As trained, experienced nutritionists, we can provide you with personalised guidance on how to manage your weight during the IVF process. Working with your IVF clinic, we can monitor your weight throughout the process and ensure that your weight gain is minimised throughout your treatment and, hopefully, pregnancy too. We can also provide protocols that will support hormone detoxification once it’s safe to do so. Book a complimentary call with one of our team today to find out more about how we can help you manage your weight throughout your IVF treatment and beyond.

HOW CAN I REDUCE BLOATING DURING IVF?

Bloating and water retention are common and unpleasant side effect of IVF. While being bloated and retaining water aren’t the same as gaining body fat, they can contribute to the feeling of having gained weight. There are a number of steps you can take to reduce the severity of your bloating and water retention.

Avoid processed foods. Refined carbohydrates, sugars and processed salt can cause bloating and water retention. Avoid ultra processed foods as much as possible. Here’s our guide to spotting and avoiding ultra processed foods.

Avoid overeating. Eat moderately sized meals so that overconsumption doesn’t exacerbate bloating. Chew your food thoroughly and eat slowly to allow your brain time to register that your stomach is getting full.

Try and exercise. Gentle exercise such as walking, yoga, or swimming can help stimulate your digestive system and reduce bloating.

Wear comfortable clothing. And avoid tight or restrictive clothing.

Consult IVF clinic if your bloating is severe or accompanied by other symptoms such as abdominal pain or nausea. They may recommend additional investigations or treatment if necessary.

WHAT ROLE DOES WEIGHT PLAY IN IVF?

It is not just post-IVF that weight plays a role in the process. According to studies, weight also plays a significant role in IVF outcomes, affecting both female and male fertility. For women, being overweight or obese (BMI ≥30 kg/m²) can negatively impact IVF success rates. Obese women often require higher doses of gonadotropins, produce fewer follicles, and have lower peak estradiol levels during ovarian stimulation. For men, obesity can lead to poor sperm quality and lower success rates in fertility treatments. Maintaining a healthy weight is recommended for both partners to optimise IVF outcomes.

WHAT IS THE BEST DIET AFTER IVF TREATMENT?

There is no simple answer to this question, and working with a nutritionist who can support your individual needs and challenges can help to support the best outcomes for you going forward. The best diet after IVF treatment is generally one that supports overall health, hormonal balance, and recovery while potentially improving fertility outcomes. Research highlights the benefits of the Mediterranean diet, which emphasises whole grains, vegetables, fruits, nuts, legumes, olive oil, and moderate amounts of fish and low-fat dairy, while limiting red and processed meats. This dietary pattern provides essential nutrients, healthy fats, and antioxidants that may help maintain energy, support a healthy pregnancy, and reduce inflammation. However, again, it’s important to note that following individually tailored advise based on your lifestyle and nutritional needs will take the stress out of staying healthy in this stressful time.

IN SUMMARY

Here’s a brief summary of the advice outlined in our guide to IVF weight gain, and how to mange it.

• IVF medications and hormonal changes can cause temporary weight gain and bloating.
• Focus on a balanced, nutrient-rich diet, prioritising whole foods and minimising processed options.
• Stay hydrated and limit caffeine and alcohol to help reduce fluid retention and support hormone balance.
• Gentle exercise, such as walking or yoga, promotes health and manages stress—follow clinic guidance on activity.
• Manage stress through meditation, deep breathing, or supportive activities to prevent emotional eating.
• Track your food intake and habits with a diary or app for better awareness and control.
• Quality sleep supports appetite regulation—aim for 8–9 hours each night.
• If struggling with weight management, seek a registered nutritionist who specialises in fertility support.
• Bloating can be minimised by avoiding overeating, chewing slowly, and wearing comfortable clothing.
• Weight before and after IVF impacts treatment success for both partners; strive for a healthy BMI.

WORK WITH US

Our Intelligent Weight Loss Programmes are designed to take into account your fertility history, hormone health, and emotional wellbeing, rather than treating your weight in isolation. We work alongside your fertility or gynaecology team where appropriate, so that your nutrition and lifestyle plan supports your wider health and, where relevant, any future treatment plans.

Together, we will:

• Clarify realistic goals for the next 3–6 months, whether that is preparing for another cycle, supporting a healthy pregnancy, or simply feeling more like yourself again.
• Identify key dietary, lifestyle, and mindset shifts that will make the biggest difference to your weight, energy, and mood, without unnecessary restriction.
• Provide ongoing support, accountability, and adjustments to your plan as your situation and hormones change over time.

If you’d like structured, specialist support with losing weight after IVF, you can book a complimentary call with one of our nutritionists to explore whether working together feels like the right next step for you.

You can use this link to book in for a complimentary call with one of our nutritionists today. This is an opportunity to talk through your challenges with a qualified, experienced professional. Together you can decide whether one of our Intelligent Weight Loss Programmes is right for you. Or contact us to request a copy of our brochure. A member of our team will get back to you soon.