SINGAPORE – Punishing hot weather affects not only a person’s health or work productivity but also affects couples’ fertility and birth outcomes, a project by the National University of Singapore( NUS) found.... The rate refers to the average number of babies each woman would have during her reproductive years.... Researchers from the NUS Yong Loo Lin School of Medicine studied sperm samples from 818 men that were already stored at the National University Hospital’s( NUH) andrology section....