Women working irregular shifts may be at riskof low fertility

从事体力劳动的职业女性可能会有低生育风险

                             

文章刊登于国际妇产科联盟网站，由妇产科在线独家翻译撰写。

   Women who work at night or follow irregular shift patternscould be in danger of suffering from low fertility, a new study hasindicated. 

    一项最新研究发现：值夜班或者有一定体力劳动的职业女性可能存在低生育风险。

 

    Research from Harvard University found that shift and nightworkers had fewer eggs capable of developing into healthy embryos compared tostaff who operated in regular daytime hours. 

    来自哈佛大学的研究发现：相比于“朝九晚五”的职业女性，工作中有夜班或者体力劳动的职业女性会有更少的卵子能够发育成正常的胚胎。

 

    The study, which was carried out by the university’s ChanSchool of Public Health and published in Occupational and EnvironmentalMedicine, discovered that there was a reduction of roughly 15 per cent in thenumber of eggs ready for fertilisation in women with jobs that called for heavylifting, such as nursing. Women who moved or lifted heavy loads at workhad 8.8 per cent fewer total eggs and 14.1 per cent fewer mature eggs whencompared to those who never carried out such duties. 

    这项研究在哈佛大学公共卫生学院展开并发表在《职业与环境医学》期刊上。研究发现：体力劳动的职业女性，如护士，能够受精的卵子数大约会减少15%。相比于没有体力劳动的职业女性，有体力劳动的职业女性总卵子数和成熟卵子数分别会减少8.8%和14.1%。

 

    The connection between heavy lifting and mature egg yield wasalso stronger among women who were overweight, obese or aged 37 or over. Factorsthat the researchers looked at included the number of antral follicles, levelsof follicle-stimulating hormone and estrogen levels. 

    体力劳动与成熟卵子数量之间的相关性，比女性超重，肥胖和年龄大于37的相关性都要强。窦滤泡数（AF）、卵泡刺激素(FSH)和雌激素(E2)水平都是研究人员所关注的因素。

 

   Audrey Gaskins, research associate in the Department ofNutrition, said: “Our study is the first to show that occupational heavylifting and non-day shifts may be adversely affecting egg production and quality,rather than accelerating ovarian aging. Future work, however, is needed todetermine whether egg production and quality can be improved, and if so, howquickly, if these work exposures are avoided.”

    营养学会的研究员Audrey Gaskins提到：“我们的这项研究是首次阐述体力劳动与夜班可能会影响卵子数量和质量，而不是加速卵巢衰老。未来还需要进一步研究如果职业女性不再从事体力劳动性工作和值夜班，是否卵子数量和质量会有所提高。”

 

   Although scientists were not able to analyse the possibleeffects of factors such as working hours, testosterone levels or exposure tosmoking, anxiety caused by a changing body clock or through physical exertionwas one explanation for the findings. 

    虽然科学家没有分析可能产生影响的因素，如：工作时间，睾酮水平或者接触吸烟情况，但是由生物钟改变或体力劳动引起的焦虑可以解释这项研究。

 

    How moving or lifting heavy loads impacts egg quality iscurrently unknown, while night time and irregular shift patterns impacted eggyields through circadian rhythm disruption. 

    体力劳动是如何影响卵子质量目前是未知的，但是夜班和体力劳动通过打破生物钟产生对卵子数量的影响。

 

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