What Not to Eat During IVF in Hong Kong? Food Restrictions List from Fertility Centers
What not to eat during IVF in Hong Kong? This article compiles a list of dietary restrictions recommended by fertility centers, including alcohol, high-caffeine drinks, raw foods, high-mercury fish, etc., to avoid during ovulation induction, after egg retrieval, and before and after embryo transfer, along with explanations and personalized adjustment suggestions.
Opening: A Real Consultation Scenario
Last Wednesday, a 41-year-old patient asked a very practical question during a follow-up visit at a fertility center in Central, Hong Kong: "I'm about to start ovulation induction. Besides alcohol and cigarettes, what else is really off-limits? There's so much conflicting information online that I'm even afraid to use soy sauce." This question is quite representative—dietary anxiety is very common during IVF cycles, but information overload often leaves people feeling overwhelmed. As a patient education specialist, I encounter similar questions almost every clinic session. This article organizes the most common dietary restriction advice given by fertility centers, clearly explained by stage and situation.
I. Foods Clearly to Avoid During an IVF Cycle
According to clinical guidelines from most fertility centers in Hong Kong, the following food categories are recommended to be strictly limited or completely avoided during IVF treatment. This is not to create unnecessary stress, but because these foods have clear mechanisms that may affect treatment outcomes.
| Food Category | Specific Examples (Common in Hong Kong) | Suggested Alternatives |
|---|---|---|
| Alcoholic Beverages | Red wine, white wine, beer, cocktails, herbal teas containing alcohol | Non-alcoholic drinks, flower teas (without medicinal herbs), coconut water |
| High-Caffeine Beverages | Hong Kong-style milk tea, strong coffee, energy drinks, strong tea | Decaf coffee, herbal tea, lemon water, plain water |
| Raw and Undercooked Foods | Sashimi, raw oysters, runny eggs, undercooked steak, soft-boiled eggs | Well-cooked meats, cooked seafood, thoroughly heated vegetables |
| High-Mercury Fish | Tuna, swordfish, shark, tilefish, bigeye fish | Salmon (cooked), sardines, sea bass, crucian carp |
| Blood-Activating and Stasis-Resolving Chinese Herbs | Angelica sinensis (Danggui), Chuanxiong, safflower, salvia miltiorrhiza (Danshen), notoginseng (Tianqi), motherwort (Yimucao) | Must consult a fertility center TCM practitioner before use |
| High-Sugar Processed Foods | Hong Kong-style desserts, sugary drinks, cakes, cookies, instant cereals | Fresh fruit, unsweetened yogurt, nuts, whole-wheat crackers |
| Excessively Cooling Ingredients | Watermelon, bitter melon, mung beans, Job's tears (coix seed), hairy crab, snow frog | Neutral-warm foods like pumpkin, yam, chicken |
The table above is the most basic list. It should be noted that specific recommendations may vary slightly between different fertility centers, but the core principles are consistent: reduce inflammation, maintain hormonal stability, and avoid infection and toxin exposure.
II. How Reproductive Doctors View These Dietary Restrictions
A senior doctor from the Fertility Center at Hong Kong Sanatorium & Hospital once shared a perspective in an internal lecture that I find very valuable: "Dietary restrictions should distinguish between 'medical necessity' and 'cultural habits.' Alcohol, raw foods, and high-mercury fish are clear medical taboos. However, certain cooling foods or so-called 'inflammatory foods' are more based on individual constitution and TCM theory, requiring personalized judgment rather than a one-size-fits-all approach."
In other words, doctors are primarily concerned with only a few key points:
- Avoiding infection—Raw and undercooked foods may carry Listeria, Toxoplasma, etc., posing a serious threat to early embryos.
- Avoiding hormonal disruption—Alcohol and certain Chinese herbs can interfere with the endocrine system, affecting ovulation induction outcomes and endometrial preparation.
- Avoiding heavy metal accumulation—Methylmercury in high-mercury fish can cross the placenta and affect fetal nervous system development.
- Avoiding drastic blood sugar fluctuations—High-sugar diets can worsen insulin resistance, impacting egg quality and endometrial receptivity.
Many other so-called "taboos," such as avoiding soy sauce, eggs, or beef, lack medical evidence in mainstream Hong Kong fertility centers. If you encounter such claims from other sources, it's best to ask your primary doctor directly rather than self-imposing restrictions.
III. Why These Foods Need to Be Avoided – Mechanism Explanation
Understanding the reasons behind these restrictions can help you manage your diet more rationally, rather than over-restricting out of anxiety.
3.1 Alcohol
Alcohol directly affects the liver's metabolism of estrogen, leading to fluctuations in blood estrogen levels. During ovulation induction, this fluctuation can interfere with the synchronized development of follicles; around the time of embryo transfer, it may affect endometrial preparation and embryo implantation. Additionally, alcohol increases oxidative stress, which is detrimental to both egg and sperm quality.
3.2 Caffeine
Caffeine constricts vascular smooth muscle, potentially reducing blood flow to the uterus and ovaries. Studies suggest that women consuming over 200mg of caffeine daily (roughly equivalent to one cup of Hong Kong-style milk tea or two cups of instant coffee) may have a slightly lower IVF live birth rate. Hong Kong-style milk tea, due to its high tea concentration, often contains more caffeine than regular milk tea, a fact easily overlooked.
3.3 Raw and Undercooked Foods
During an IVF cycle, especially after egg retrieval and embryo transfer, the body is in a state of immune modulation, potentially lowering its defense against pathogens. Although Listeria infection is rare, it can be devastating to an early embryo if it occurs. Sashimi, raw oysters, and runny eggs are common sources of infection in Hong Kong and should be avoided throughout the entire cycle (from the start of ovulation induction until the pregnancy test).
3.4 High-Mercury Fish
Methylmercury is metabolized slowly in the body, with a half-life of several months. If you frequently consume high-mercury fish while preparing for pregnancy or during IVF, accumulated mercury may affect egg quality and early embryonic development. Tuna (especially bigeye tuna) found in Hong Kong waters tends to have high mercury levels. It is advisable to switch to salmon, sardines, or locally farmed fish.
3.5 Blood-Activating and Stasis-Resolving Chinese Herbs
Herbs like Angelica sinensis and Chuanxiong are commonly used in TCM to invigorate blood and regulate menstruation, but their use during an IVF cycle requires great caution. In the late stages of ovulation induction and after embryo transfer, these herbs may affect endometrial stability or even increase the risk of uterine contractions. Many patients in Hong Kong have the habit of taking Chinese herbal tonics, but this must be done under the guidance of a fertility center physician; do not add them on your own.
IV. Most Easily Overlooked Dietary Details
The following points are most frequently overlooked by IVF patients in Hong Kong and are common reminders from our education specialists.
A cup of Hong Kong-style milk tea (approx. 250ml) typically contains 150-250mg of caffeine, and some with a stronger tea base can exceed 300mg. Doctors usually recommend keeping total daily caffeine intake below 150mg. So, if you drink one cup of Hong Kong-style milk tea daily, your caffeine intake is already over the limit. Consider switching to decaf coffee or herbal tea.
Hong Kong has many siu mei (roasted meat) shops, but the time between preparation and consumption can be long, especially in summer. Poor temperature control can easily lead to bacterial growth. During an IVF cycle, it's best to eat freshly cooked food. If you buy siu mei, make sure to reheat it thoroughly at home before eating; avoid consuming it cold.
Hong Kong people love hot pot, but during an IVF cycle, special attention is needed: meat, seafood, and fish balls must be cooked through until well done; don't aim for tenderness. Also, repeatedly boiling hot pot broth increases purine levels, which is a concern for those with high uric acid.
Some condiments and sauces may contain alcohol (e.g., certain rice wines, cooking wines, fermented bean curd) or high sugar (e.g., hoisin sauce, oyster sauce). Although the amounts used are small, if you are concerned, you can choose alcohol-free seasonings or substitute with fresh herbs and lemon juice.
V. Frequently Asked Questions
Q: Can I eat seafood during ovulation induction?
A: Yes, but choose low-mercury varieties and ensure they are thoroughly cooked. Salmon, cooked shrimp, crab meat, scallops, and sardines are good choices. Avoid large deep-sea fish like tuna, swordfish, and shark. Additionally, if you are allergic to certain seafood or have high uric acid issues, adjust according to your own condition.
Q: Can I eat spicy food after embryo transfer?
A: If you regularly eat spicy food and your gut is accustomed to it, consuming it in moderation (as long as it doesn't cause gastrointestinal discomfort) is usually fine. However, if you don't usually eat spicy food, suddenly eating it after transfer may cause intestinal cramps or diarrhea, indirectly affecting uterine stability. Additionally, excessively spicy food may cause body heat and inflammatory responses; it's advisable to keep your diet light.
Q: Do I need to take additional supplements or health products?
A: Do not add them on your own. Folic acid, Coenzyme Q10, Vitamin D, etc., are commonly recommended supplements by doctors, but the type and dosage depend on your age, AMH level, and previous cycle history. At Hong Kong fertility centers, doctors provide personalized nutritional advice during the initial consultation. Taking supplements (especially Chinese patent medicines) of unknown composition on your own may interfere with treatment effectiveness.
Q: Do I need to drink beverages to prevent ovarian hyperstimulation after egg retrieval?
A: If you are at high risk for OHSS (Ovarian Hyperstimulation Syndrome) (e.g., high AMH, many antral follicles, high number of eggs retrieved), doctors usually recommend a high-protein diet and drinking plenty of water or electrolyte drinks. You can drink coconut water, winter melon soup (without the skin), fish soup, etc., but there's no need to blindly follow "anti-OHSS" folk remedies. Follow your doctor's specific advice.
Q: Can I drink coffee during an IVF cycle?
A: Yes, but you need to control the amount. It is recommended to keep daily caffeine intake below 150mg, roughly equivalent to one small cafe latte (about 240ml) or half a cup of Hong Kong-style milk tea. If you are sensitive to caffeine and prone to palpitations or insomnia, it's best to avoid it completely.
VI. Case Scenario Analysis
Background: A 35-year-old patient, AMH 2.8 ng/mL, on a long protocol for ovulation induction. The patient habitually drank two cups of Hong Kong-style milk tea daily, thinking it "refreshes without intoxication," unaware that caffeine might affect follicle development.
Problem: On day 7 of ovulation induction, an ultrasound showed fewer follicles than expected (9 grew out of an initial 15 antral follicles). The patient was very anxious.
Analysis: Although the reduced follicle count wasn't necessarily caused by caffeine, the doctor advised reducing caffeine intake to below 100mg daily. The patient switched to decaf coffee and increased water intake. Subsequent follicle growth stabilized, ultimately yielding 12 eggs, 10 of which were mature.
Reminder: The effect of caffeine on ovarian blood flow varies from person to person, but controlling intake during ovulation induction is a simple and risk-free optimization measure.
Background: A 39-year-old patient preparing for a frozen embryo transfer. One week before the transfer, she started drinking Angelica sinensis and red date tea on her own, believing it would "warm the uterus and aid implantation."
Problem: An ultrasound before the transfer revealed excessively strong endometrial blood flow signals, an endometrial thickness of 14mm, but poor morphology. Upon questioning, the doctor learned the patient had been taking Angelica sinensis.
Analysis: Angelica sinensis has blood-activating properties, which in some patients can cause excessive endometrial blood flow, paradoxically affecting endometrial receptivity. The doctor advised stopping it and postponing the transfer for one cycle. Two weeks after discontinuation, a follow-up showed restored endometrial morphology, and the patient achieved a successful pregnancy after the transfer.
Reminder: Chinese herbal therapy must be conducted under the joint guidance of a fertility center physician and a TCM practitioner. Especially 1-2 weeks before embryo transfer, blood-activating and stasis-resolving herbs should be avoided.
VII. Most Common Pitfalls
7.1 Overnutrition Due to Over-Restriction
Some patients, driven by anxiety, adopt every online "taboo" they find, ending up eating only white rice and vegetables, leading to severe protein deficiency. Follicle development requires high-quality protein and essential fatty acids; excessive restriction can actually harm egg quality. Remember: the restriction list is about "avoiding harmful things," not "only eating safe things." A balanced diet is fundamental.
7.2 Blindly Believing in "Miracle Foods"
Online posts often promote "IVF miracle foods," like "eating durian thickens the endometrium," "drinking soy milk boosts progesterone," or "eating grapefruit aids implantation." Most of these claims lack high-quality evidence and individual responses vary greatly. For example, the isoflavone content in soy milk is very low; relying on it to boost progesterone is unrealistic and may cause bloating or interfere with main meals if consumed excessively.
7.3 Ignoring Individual Differences in Constitution
Hong Kong is a place with diverse dietary cultures, and everyone's constitution and eating habits are different. The same food might have no effect on person A but cause discomfort for person B. Take dairy products: some people experience bloating and diarrhea after drinking milk, while others have no issues. It is recommended to adjust based on your own past dietary experiences rather than copying someone else's meal plan.
7.4 Equating Dietary Restrictions with "Absolute Prohibition"
Except for alcohol and raw foods, which are clearly absolute prohibitions, many other foods (like coffee, spicy foods, cooling fruits) are more a matter of "quantity." Having a small piece of watermelon or half a cup of coffee occasionally usually won't have catastrophic consequences. The overall dietary pattern is what matters, not fixating on a single food item.
VIII. Observations from a Practitioner
In my years of patient education at a fertility center, I've noticed a pattern: patients who approach dietary management with excessive stress often endure more psychological pressure during treatment, and this pressure itself can have a greater impact on their endocrine system than eating the wrong food. Conversely, patients who pay no attention to their diet may indeed affect their treatment progress due to improper intake.
The ideal state is: understand the basic principles of restriction, implement them naturally in your daily diet, and don't get hung up on extreme cases. If you're unsure whether a certain food is safe, the simplest solution is—take a photo and send it to your case manager or nutritionist at the fertility center for their assessment. Most fertility centers in Hong Kong offer this service.
Additionally, I've observed that patients in Hong Kong use "Chinese medicine" and "food therapy" more frequently than those in many other regions, which is a cultural characteristic of Hong Kong. But please remember: Chinese medicine and food therapy are complementary tools, not substitutes for standard medical treatment, and they must be used with knowledge and consent from your doctor.
— Compiled by a patient education specialist at a Hong Kong fertility center. Content is for informational reference only and does not constitute medical advice —
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