Declining total fertility rates have been observed in low- and middle-income countries (LMICs). However, it remains unclear if this trend is related to a reduction in fecundity of general population. Research evidence on contributing factors to fecundity reduction is also limited. We aimed to first estimate couple fecundity in LMICs and then investigate its association with ambient particulate matter (PM) exposure.

中文翻译：

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低收入和中等收入国家普通人群夫妇生育力的估计及其与每月随时间变化的环境颗粒物暴露的关系：一项基于人群的多中心流行病学研究


低收入和中等收入国家（LMIC）的总生育率正在下降。然而，目前尚不清楚这种趋势是否与一般人群的生育力下降有关。关于生育力降低的影响因素的研究证据也很有限。我们的目的是首先估计中低收入国家的夫妇繁殖力，然后研究其与环境颗粒物 (PM) 暴露的关系。