For couples considering fertility treatments, summer offers a critical biological advantage. Research confirms that pregnancy rates are higher in IVF cycles started during warmer months. Vitamin D plays a pivotal role in reproductive health, influencing egg quality, sperm function, and embryo implantation. Seasonal variations, particularly during summer months, can significantly impact Vitamin D levels due to increased sun exposure. Studies have observed that serum Vitamin D concentrations are highest in summer and lowest in winter, with a significant increase in the 25 OH(D) levels during summers, both in men and women. Moreover, studies have noted seasonal variations in conception rates, with peaks during summer and autumn.

This trend suggests that increased sunlight exposure during these seasons elevates Vitamin D levels, potentially improving fertility. Beyond biological benefits, stress reduction plays a crucial role. In 2023, researchers in Australia have found that transferring frozen then thawed embryos to women’s wombs from eggs collected in the summer resulted in a 30% higher likelihood of babies born alive, than if the eggs had been retrieved in the autumn. Summer allows for more flexible schedules, reduced work pressure, and improved emotional well-being, all of which support hormonal balance for conception. With summer’s biological advantage in full effect, waiting could mean missing a key fertility window. Gynaecologists should encourage patients to start their IVF journey now before another cycle is lost. At Oasis, summers have never affected the success rates- they remained consistent delivering more than 60%.