图5 Hagai Levine和Shanna SwanLevine也将矛头指向了环境毒素,动物研究表明环境毒素与荷尔蒙紊乱之间存在联系,这会对生殖能力造成阻碍。“母亲在怀孕期间接触的人造化学品是头号嫌疑人,成年后生活中对人造化学品的接触和不良的生活方式也都可能与精子数量减少有关。” 不过,Levine对扭转这一趋势表示乐观:“理论上它总是可逆的。”如果科学家和决策者能够确定原因,大规模地采用更健康的生活习惯将改善生殖健康,但在那之前,还需要进行更多的研究。 参考资料: [1]Hagai Levine, Niels Jørgensen, Anderson Martino-Andrade,et al. Temporal trends in sperm count: a systematic review and meta-regression analysis of samples collected globally in the 20th and 21st centuries, Human Reproduction Update, 2022;, dmac035, https://doi.org/10.1093/humupd/dmac035[2]https://www.timesofisrael.com/sperm-counts-worldwide-fell-by-62-in-under-50-years-israeli-led-study-finds/[3]Hagai Levine, Niels Jørgensen, Anderson Martino-Andrade, et al. Temporal trends in sperm count: a systematic review and meta-regression analysis, Human Reproduction Update, Volume 23, Issue 6, November-December 2017, Pages 646–659, https://doi.org/10.1093/humupd/dmx022[4]https://healthpolicy-watch.news/decline-in-sperm-count-environmental-ties/ [5]https://www.sciencealert.com/sperm-counts-are-dropping-across-the-world-and-the-decline-is-accelerating