The objective of this study was to evaluate whether evolution of bone mineral density (BMD) is associated with the thyroid hormone profile in a cohort of euthyroid women with no other known diseases within 1 year. Methods: This was a prospective cohort study conducted at the University of Campinas, Brazil. We used a database with 52 women aged 20-39 who were followed for 1 year in a family planning outpatient clinic. The inclusion criteria were body mass index (BMI) <30 kg/m 2 , no known diseases/medication use, fasting glucose <100 mg/dl, and 2 h glucose after a 75 g oral glucose load <140 mg/dl. The women were divided into groups of normal weight (n = 30) and overweight (n = 22). The main outcomes were BMD measured by dual-energy x-ray absorptiometry (DXA) and thyroid hormone profile (thyrotropin TSH, free triiodothyronine FT3, free thyroxine FT4, and T3/T4 ratio); other variables were body composition (DXA), calcium metabolism markers, and life habits. We used a repeated measures analysis of variance (ANOVA) and multiple regression analyses to evaluate associations. Results: At the baseline data collection, overweight women showed a higher T3/T4 ratio, leptin, calcium, BMD in the lumbar spine and total femur, total mass, mass, and percentage of fat mass than normal weight women. At 12 months, both groups had increased FT4, calcium, ALP, femoral neck BMD, and total mass by time effect. The normal weight group presented a decrease of vitamin D when compared to the baseline. Increased BMD of the femoral neck was associated with moderate coffee intake, and as such, there were no associations found between this increase and the thyroid hormone profile. Leptin and ALP were associated with total mass variation, while leptin and PTH were associated with fat mass variation. The normal BMI was inversely associated with the variation of total mass, mass, and percentage of fat mass, and engaging in regular physical activity was inversely associated with fat mass variation. Conclusions: In this sample of euthyroid healthy women who were both normal weight and overweight, the thyroid hormone profile was not associated with variations in bone mineral density and body composition after a 1 year follow-up.

Objective To evaluate calcium metabolism and bone mineral density (BMD) in new users of depot medroxyprogesterone acetate (DMPA) in the first year of use. Methods This prospective, non‐randomized study, conducted at the University of Campinas, São Paulo, Brazil, was carried out between February 2011 and February 2013. Women aged from 18 to 40 with a body mass index (BMI, calculated as weight in kilograms divided by the square of height in meters) <30 and with no known history of disease or medication use who chose to use DMPA were paired by age (±1 year) and BMI (±1) with women commencing the use of a copper intrauterine device (IUD). The primary outcomes were BMD measured by dual‐energy X‐ray absorptiometry and calcium metabolism markers; other variables were body composition and lifestyle habits. Repeated measures analysis of variance (ANOVA) and multiple regression analyses were used to evaluate associations. Results Twenty‐seven women using DMPA and 24 using IUD were evaluated, with a mean age of 29.7 years and 28.6 years, respectively. The DMPA group presented with a 3.6% (P<0.001) loss of lumbar spine BMD, a 2.1% (P=0.100) loss of femoral neck BMD and higher phosphorus (P=0.014) concentrations at 12 months compared to the IUD group. The decreases in BMD were associated with the use of DMPA, while total mass and coffee intake were found to be protective factors. Conclusion Changes in calcium metabolism and a decrease in BMD were found in the DMPA group at 12 months.

Objective: To evaluate Brazilian women with different body mass index (BMI, calculated as weight in kilograms divided by the square of height in meters) values who were switching from a short-acting reversible contraceptive (SARC) to a long-acting reversible contraceptive (LARC) method in relationship to the reasons reported for switching and the LARC method chosen. Method:We analyzed retrospective data from 1508 women aged 18-49 years who chose a LARC for the first time. The variables were sociodemographic, BMI, SARC in use, the reason given for switching, the chosen LARC (copper intrauterine device, levonorgestrel (52 mg) intrauterine system or ethyl norgestrel implant), and expectations of the LARC. We used χ 2 , Mann-Whitney, and Kruskal-Wallis tests to compare BMI groups. The significance level adopted was 5%. Results:The obesity group, 320 women (21.2%), reported weight gain (P < 0.000) and fear of pregnancy (P = 0.004) as the most frequent reasons for switching, whereas the normal weight group, 637 women (42.2%), reported more loss of libido (P < 0.000) and other personal complaints (P = 0.002). The IUD was chosen by 851 women (56.6%) and significantly by the largest number of obese women. Conclusion: Women in different BMI categories report different reasons for switching from SARC methods and elect different LARC methods for contraception. K E Y W O R D S body mass index, Brazil, contraception, long-acting reversible contraception How to cite this article: Frederico G, Silva dos Santos PN, Ferreira JM, Bahamondes L, Fernandes A. Female body mass index and the selection of a long-acting reversible contraception for the first time.