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Sperm Quality Declines with Time: Rethink Abstinence
25 Mar
Summary
- Sperm deteriorates in the body, showing DNA damage and stress.
- Fertility clinics may need to revise sperm collection guidelines.
- Shorter abstinence periods may improve IVF pregnancy rates.
Research indicates that men should reconsider prolonged abstinence before fertility treatments, as sperm quality may decline over time. A large-scale meta-analysis encompassing human and animal studies revealed that sperm stored in the body for longer periods exhibits more DNA damage and oxidative stress, rendering it less viable and mobile.
These findings directly question current World Health Organization guidelines, which suggest two to seven days of abstinence before sperm collection for fertility tests or IVF. While these guidelines aim to maximize sperm count, the new evidence suggests they may compromise sperm quality. Experts propose that a balance between sperm quantity and quality is crucial for successful fertilization.
Recent clinical trials support this, showing a higher pregnancy rate of 46% when men abstained for less than 48 hours compared to 36% for longer abstinence periods during IVF. For couples trying to conceive naturally, a moderate abstinence period, avoiding extremes, is recommended. The freshest, most motile sperm with lower DNA damage are considered more important for assisted reproductive technologies.
