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Fertility and Seasonal Changes

Dr. Juan Arturo Morales Aguirre

Updated: Oct 23, 2023

On this occasion, we will delve into an intriguing topic that has captured the attention of researchers and couples planning to conceive: the influence of seasons on human fertility. Is there a seasonal pattern in conception? Join us as we unravel the most relevant findings from this fascinating study area.





Is there a seasonal pattern in conception?

Several studies have sought to establish whether there is a correlation between seasons of the year and conception rates. While results vary, some studies have suggested the presence of seasonal patterns in conception.



These patterns might be of particular interest to couples planning to conceive, as they seek to capitalize on the most opportune moments.


How can seasons affect fertility?

Several factors might be involved in the influence of seasons on human fertility:

· Hormonal changes: It has been proposed that exposure to different levels of sunlight during seasons could affect circadian rhythms and the body's hormones. For example, melatonin, a hormone related to sleep and reproductive cycle regulation, may vary based on the amount of light received.

· Human behavior: Climate and seasons can impact human behavior and mood. Some research suggests that this could influence libido and the frequency of sexual intercourse, which might affect conception rates.

· Sperm quality: Studies have also shown that sperm quality can be affected by seasons. Some researchers have found variations in sperm concentration, mortality, and morphology at different times of the year.


It's important to note that, although these associations have been observed in studies, a clear and definitive mechanism behind these seasonal patterns of human fertility has not yet been determined. Additionally, fertility is a complex topic that can be influenced by multiple factors beyond the seasons of the year.

The relationship between seasons and human fertility is an intriguing topic for both researchers and couples seeking to conceive.


While some studies have suggested the existence of seasonal patterns in conception, there is still much to be learned and understood about this phenomenon. As always, it's essential to remember that fertility is complex and multifaceted, and conception can happen at any time of the year.



If you are considering conceiving or if you simply find this topic interesting, we invite you to continue exploring and learning about fertility and its various aspects on our blog.

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