🌞 Summer, fertility, and heat: Tips for the most vibrant season of the year for your reproductive health.

Summer, with its radiant heat, long days, and the opportunity to enjoy the outdoors, is a time full of energy and vitality. However, it’s also important to recognize how high temperatures and changes in our lifestyle can affect our reproductive health, both in women and men.

In this article, we’ll explore how summer can be both an opportunity to take care of your fertility and a time to be aware of the effects of heat on conception. Let’s make the most of this season to optimize our reproductive health!

☀️ The sun and fertility: more vitamin D, better ovarian health.

The summer sun is a natural and powerful source of vitamin D, an essential nutrient for fertility. Vitamin D helps regulate reproductive hormones, improves egg quality, and supports embryo implantation. Studies have shown that women with adequate levels of vitamin D are more likely to conceive.

What to do? Take advantage of sunny days to enjoy sunlight briefly and at the right times. A few minutes in the sun early in the morning (before 10 AM) or in the late afternoon (after 4 PM) can be enough to stimulate vitamin D production without the need for sunscreen.

Short and controlled sun exposure during these times of lower ultraviolet radiation allows you to benefit from the sun—such as vitamin D synthesis and circadian rhythm regulation—without relying on sunscreen. Avoiding prolonged and intense exposure not only protects the skin but also reduces the need to apply products that contain chemical filters (like oxybenzone, homosalate, or octinoxate), which can be absorbed by the skin and are associated with potential hormonal and toxic effects. Therefore, moderate sun exposure during safe hours, without depending on constant use of sunscreen, is ideal.

💡Tip: If you’re trying to conceive or undergoing fertility treatment, consult your doctor about your vitamin D levels and evaluate, together, whether you need to adjust your diet, supplementation, or sun exposure habits.

🍉 Summer fresh foods that boost your fertility.

Summer is the perfect time to incorporate fresh and natural foods that support reproductive health. Seasonal fruits and vegetables, especially those high in water content, help maintain good hydration, regulate body temperature, and provide key nutrients for fertility. But it’s important to know how and when to consume them to avoid excess sugar and maximize their benefits.

🌿 Fruits that hydrate without overloading on sugar.

Fruits like watermelon, melon, cucumber, and citrus are perfect for this season: they contain a large amount of water, antioxidant vitamins, and minerals that support hormonal balance. They’re an excellent alternative to industrial desserts or sugary ice cream.

🥤 What about juices? Better with caution.

Although fruits are healthy, it’s important to avoid excessive consumption of freshly squeezed juices. By removing the fiber, the sugars are concentrated, leading to a higher glycemic response, which can negatively affect hormonal regulation, especially in individuals with insulin sensitivity. In many cases, a fruit juice can contain as much sugar as a soft drink.

For this reason, it’s better to opt for whole fruit or flavored water with whole fruit, which adds flavor without overloading the body. Many people use juices as a substitute for sugary and fizzy drinks, which— as we mentioned in a previous article— should also be consumed in moderation if you’re focusing on your fertility. But we offer you an even better alternative at the end of this paragraph.

💡 How and when to consume fruit?

• Prefer whole, fresh fruit rather than smoothies or freshly squeezed juices.

• Eat it between meals or at breakfast to avoid glucose spikes that can interfere with hormonal regulation (especially if you're trying to conceive or have polycystic ovary syndrome).

• Avoid large quantities at night, when insulin sensitivity decreases.

• If you crave something sweet after meals, choose a small portion of fruit paired with healthy fat, such as a spoonful of plain Greek yogurt without sugar or a little homemade whipped cream with no added sugar. This helps reduce the glycemic impact and increases satiety.

🍋 Flavored and fresh waters: The best alternative.

A great option to stay hydrated and avoid juices and sugary drinks is homemade flavored waters, which refresh without adding sugar:

• Cold water with lemon slices, fresh mint leaves, and ice.

• Water with ice, cucumber chunks, ginger, and apple (without crushing or squeezing).

• Water with whole berries, fresh basil, and a touch of lime.

• Cold hibiscus or chamomile infusions, with no added sugar.

These drinks preserve the natural flavor and benefits of fruit without causing a glucose spike. They are especially recommended if you're undergoing fertility treatment or planning a pregnancy.

🥗 Take care of the quality of what you eat: Less processed, more natural.

In summer, when appetite changes and the desire to cook sometimes fades, it’s common to resort to pre-cooked or quick-preparation foods. However, to support fertility, the ideal is to choose fresh, whole, and known-origin foods, with low levels of processing and without unnecessary additives.

Practical tips for better choices:

• Avoid industrially prepared or ready-to-heat meals (such as rice, pasta, or frozen dishes with multiple artificial ingredients).

• If you buy canned goods, prefer those in glass jars rather than cans or plastic containers, as the latter can release compounds like bisphenol A (BPA), which has been linked to hormonal disruptions.

• Opt for canned goods in olive oil instead of refined oils or low-quality vegetable blends.

•  If you choose "ready-to-eat" vegetables, be sure to wash them again at home, even if the packaging says they’re already clean.

•  Instead of prepared dishes, choose simple combinations with real ingredients: for example, whole-grain bread with fresh tomato and anchovies in oil, rather than pre-cooked dishes like “microwave-ready paella.”

💡Summary: A diet rich in fresh foods, well-hydrated, with low added sugar content and minimal exposure to industrial chemicals can have a very positive impact on your fertility.

🏖️ Heat and fertility: Does it affect... and if so, is air conditioning the solution?

As we’ve seen, summer can be a great opportunity to support reproductive health: more natural light, better rest, and more time spent outdoors. However, high temperatures can also have a negative impact on fertility, both in men and women. Here’s how heat affects fertility and whether air conditioning can be part of the solution.

🔥 Male fertility and heat.

Sperm production requires a temperature that is 2°C to 4°C lower than the body temperature. Several studies have shown that sustained environmental heat reduces sperm quality, affecting volume, concentration, motility, morphology, and even increasing DNA fragmentation.

An interesting finding is that, even in air-conditioned offices, semen quality remains lower in summer compared to winter, suggesting that the general environmental temperature already influences sperm quality beyond the immediate surroundings.

The effects of heat on sperm DNA can be reversible, but the process isn’t immediate: the damage may take between 70 and 90 days (a full spermatogenesis cycle) to reverse after removing thermal exposure.

💡 Tips: Controlling body temperature with simple measures—such as wearing loose clothing, spending time outdoors during cooler hours, or avoiding intense physical activity during peak heat—can be key to protecting sperm quality, given its high sensitivity to thermal stress.

👩‍⚕️ Female fertility and heat.

Although less studied, heat can also negatively affect female fertility. A study published in PMC observed that chronic exposure to high temperatures for 90 days is associated with a significant decrease in antral follicle count (a marker of ovarian reserve), suggesting a possible acceleration of ovarian aging.

Other factors that are altered by heat include:

• Dehydration: reduces the production of fertile cervical mucus, making fertilization more difficult.

• Changes in lifestyle: travel, stress, or sleep disorders can affect the hormonal axis.

• Thermal stress: extreme heat can disrupt the regularity of menstrual cycles.

Additionally, several studies have indicated that heatwaves increase the risk of preterm birth in pregnant women, with an estimated rise of up to 5% for each additional degree Celsius.

💡 Tips: Preventing thermal stress and maintaining good hydration, choosing cool environments, and avoiding prolonged sun exposure can help protect both ovulation and ovarian reserve. Also, take advantage of outdoor time to reduce cortisol with moments of rest in nature, away from heatwaves!

❄️  Air conditioning with purpose: More than just comfort.

Air conditioning can play a protective role if used correctly:

In men, it helps prevent testicular overheating, which can mitigate the influence of environmental heat on sperm quality.

In pregnant women or those of reproductive age, it reduces thermal stress, decreasing potential hormonal damage, sleep deprivation, and the risk of preterm birth associated with heat.

But be careful: improper use can cause respiratory discomfort, dryness, or colds.

Advanced tips for smart use:

-Do not exceed a 6°C difference between the outside and inside temperature to avoid thermal and immune stress.

-Keep filters clean to prevent infections.

-Monitor humidity: levels below 40% increase the risk of mucosal dryness, which in women can affect fertility.

-Do not direct the air directly at your body to avoid sudden temperature changes.

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👩‍⚕️ At Mater Clinic, we accompany you through every stage of your fertility journey.

Summer can be a wonderful time to take care of your reproductive health, as long as you learn to manage external factors like heat. With small adjustments—from your clothing and hydration habits to mindful use of air conditioning—you can support ovarian and sperm quality, as well as your overall well-being.

Whether you’re trying to conceive, starting fertility treatment, or simply looking to optimize your gynecological health, we are with you every step of the way, all year round!

At Mater Clinic, we support you with an integrative, human, and personalized approach.

📞 Schedule your consultation via WhatsApp at 645 096 548 or write to us at care@mater.clinic. We are here for you.