"Winter is not suitable for pregnancy" or "The success rate of in vitro fertilization is low in winter" – these beliefs are widely spread among people. But as a scientific organization, Leila wants to shed light on this topic with data and facts: Currently, there is no reliable evidence to suggest that winter significantly reduces the chances of natural conception or the success rate of IVF. This article explores the truth behind these seasonal anxieties.

1. Conclusions first: Season isn't the decisive factor

The outcome of assisted reproduction depends primarily on medical factors such as age, ovarian reserve, sperm quality, uterine receptivity, and embryo quality. Large-scale studies have not consistently shown any significant differences between seasons. Viewing "winter" as a barrier to conception is more of a psychological belief than a medical fact.

2. Why do we have the perception of a "low point" in winter?

Perception doesn't equal reality. Winter may affect the preparation for pregnancy through several indirect pathways:

• Less sunlight → Lower vitamin D levels: Vitamin D is related to reproductive hormones. It makes sense to supplement when levels are low.
• Fewer outdoor activities → Difficulty managing weight and emotions: This indirectly affects ovulation and endocrine functions.
• More common colds → Concerns about medication use: Changing seasons can lead to illnesses, which in turn cause anxiety about medication.

These are controllable lifestyle factors, not some "secular curse."

3. The subtle impact of temperature on sperm

A slight increase in testicular temperature in men may affect sperm production. However, this is a problem caused by prolonged exposure to high temperatures (such as sitting in warm environments or wearing tight clothing), not directly related to winter conditions outside. In fact, cold itself doesn't harm sperm; it's excessive heating that needs attention.

4. What the data tell us

Instead of worrying about seasons, we should focus on controllable factors: maintaining regular sleep patterns, controlling sugar and weight, quitting smoking and alcohol, and getting early assessments. These are the real variables that affect the chances of successful pregnancy.

5. Leila's perspective

It's meaningful to take care of yourself according to the season, but the idea that winter causes infertility has no basis in reality. We recommend adapting to the seasons, but not being controlled by them. Good pregnancy doesn't depend on seasons; it depends on proper preparation.

Note: This article is based on public research consensus. It does not constitute any guarantee regarding the success rates in any particular season.