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Objective: To assess weight change and attempted weight loss during the 12-18 months before spontaneous conception in relation to the risk of pregnancy loss.Design: Prospective cohort study.Setting: United States, 2007-2011.Methods: Women (n = 629) who were attempting pregnancy reported at baseline any weight loss attempts over the past 12 months, and their minimum and maximum weights during that time. Follow up lasted one to six menstrual cycles and throughout pregnancy. Using bodyweight measured at 4 weeks' gestation, participants were categorised as having weight loss ≥5%, weight gain ≥5%, both, or neither, over the previous 12-18 months. Log-binomial models adjusted for potential confounders.Main Outcome Measures: Risk ratio (RR) and 95% confidence interval (CI) of pregnancy loss.Results: Attempted weight loss was reported by 44% of women and actual weight loss by 11%, but neither was consistently associated with pregnancy loss. The RR for recent weight gain ≥5% was 1.65 (CI 1.09, 2.49).Conclusions: Weight gain over the period spanning 12-18 months pre-conception to 4 weeks' gestation may increase the risk of pregnancy loss among fertile women with prior pregnancy losses. Attempted and actual weight loss were not associated with pregnancy loss; however, replication is needed from larger studies with data on particular weight-loss methods.Tweetable Abstract: Recent weight gain before and around the time of conception may increase the risk of pregnancy loss. [ABSTRACT FROM AUTHOR]

Objectives. To characterize cannabis-related disorder medical encounter trends in the US Medicare population during 2017 to 2022. Methods. We conducted a descriptive study, which included 56 624 432 beneficiaries aged 65 years or older and 10 247 953 aged 18 to 64 years with disability. All were continuously enrolled in Medicare (Fee-for-Service or Advantage) for 183 or more days before the first day of the calendar year. We identified cannabis-related disorder encounters using International Classification of Diseases, 10th Revision, Clinical Modification diagnosis codes and computed annual encounter rates per 10 000 beneficiaries. We used the Mann-Kendall test to analyze trends over time. Results. Annual cannabis-related disorder encounter trends among beneficiaries aged 65 years or older ranged from 15.9 (95% confidence interval [CI] = 15.8, 16.0) to 39.3 (95% CI = 39.1, 39.5) per 10 000. Rates among beneficiaries aged 18 to 64 years with disability ranged from 274.8 (95% CI = 273.6, 276.0) to 373.7 (95% CI = 372.3, 375.2) per 10 000. Rates increased over time across both groups, with average annual increases of 4.3 (95% CI = 3.3, 5.3; P  = .01) and 17.1 (95% CI = 11.0, 23.2; P  = .02) per 10 000, respectively. Conclusions. Further work is needed to explore the impact of coexisting medical conditions on outcomes that result from cannabis-related disorders. ( Am J Public Health . 2024;114(S8):S694-S697. https://doi.org/10.2105/AJPH.2024.307729).