Thongprayoon C, Vaughan LE, Chewcharat A, et al. - This population-based matched case-control study was conducted to assess if there existed an elevated risk of a first-time symptomatic renal stone during and post-pregnancy. Participants were 945 female first-time symptomatic kidney stone formers aged 15-45 years and 1,890 age-matched female controls. Per findings, the risk of a first-time symptomatic kidney stone was elevated by pregnancy. A peak in this risk was seen close to delivery and then improvement was evident by 1 year post-delivery, though a modest risk of a kidney stone was still present beyond 1 year post-delivery.