Department of Epidemiology and Environmental Health, School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY.ROR
Menstrual bleeding patterns are considered relevant indicators of reproductive health, though few studies have evaluated patterns among regularly menstruating premenopausal women. The authors evaluated self-reported bleeding patterns, incidence of spotting, and associations with reproductive hormones among 201 women in the BioCycle Study (2005-2007) with 2 consecutive cycles. Bleeding patterns were assessed by using daily questionnaires and pictograms. Marginal structural models were used to evaluate associations between endogenous hormone concentrations and subsequent total reported blood loss and bleeding length by weighted linear mixed-effects models and weighted parametric survival analysis models. Women bled for a median of 5 days (standard deviation: 1.5) during menstruation, with heavier bleeding during the first 3 days. Only 4.8% of women experienced midcycle bleeding. Increased levels of follicle-stimulating hormone (β = 0.20, 95% confidence interval: 0.13, 0.27) and progesterone (β = 0.06, 95% confidence interval: 0.03, 0.09) throughout the cycle were associated with heavier menstrual bleeding, and higher follicle-stimulating hormone levels were associated with longer menses. Bleeding duration and volume were reduced after anovulatory compared with ovulatory cycles (geometric mean blood loss: 29.6 vs. 47.2 mL; P = 0.07). Study findings suggest that detailed characterizations of bleeding patterns may provide more insight than previously thought as noninvasive markers for endocrine status in a given cycle.
menstrual bleeding patterns normal, menstrual cycle length variation, menstrual flow duration regularity, intermenstrual bleeding prevalence, heavy menstrual bleeding definition, menstrual cycle characteristics population, normal menstruation parameters, menstrual period length distribution, cycle-to-cycle variability bleeding, menstrual health epidemiology
PMID 22350580 22350580 DOI 10.1093/aje/kwr356 10.1093/aje/kwr356
Cite this article
Dasharathy, S. S., Mumford, S. L., Pollack, A. Z., Perkins, N. J., Mattison, D. R., Wactawski-Wende, J., & Schisterman, E. F. (2012). Menstrual bleeding patterns among regularly menstruating women. American journal of epidemiology, 175(6), 536-545. https://doi.org/10.1093/aje/kwr356
Dasharathy SS, Mumford SL, Pollack AZ, Perkins NJ, Mattison DR, Wactawski-Wende J, et al. Menstrual bleeding patterns among regularly menstruating women. Am J Epidemiol. 2012;175(6):536-545. doi:10.1093/aje/kwr356
Dasharathy, Sonya S., et al. "Menstrual bleeding patterns among regularly menstruating women." American journal of epidemiology, vol. 175, no. 6, 2012, pp. 536-545.
Premenstrual syndrome (PMS) affects millions of women. While over-the-counter products have helped with the physical symptoms of PMS, emotional symptoms have been less well supported. The objective of this trial was to measure the effect of an oxaloacetate/vitamin C combination on the major emotional symptoms of PMS, including depression, anxiety, perceived stress, aggression, and suicidal ideation. Forty-eight women experiencing PMS completed a baseline survey comprising the Beck's Depression Inventory, Cohen Perceived Stress Scale, Generalized Anxiety Disorder Test, and Buss-Perry Aggression Questionnaire. After baseline measurements, participants were randomly assigned to take either 2 capsules of 100 mg oxaloacetate/150 mg ascorbic acid, or 2 capsules of rice flour (placebo) for their entire menstrual cycle. At menstruation, the women completed the 4 surveys again. The women then switched capsules in a cross-over design and continued the study for an additional menstrual cycle. The final assessment was repeated at menstruation. Statistical analysis of the 4 surveys was performed to examine efficacy. Oxaloacetate/vitamin C supplementation during PMS significantly improved depression, perceived stress, anxiety, aggression, and suicidal ideation. The mean improvement in depression was 54.1%, 35.8% for perceived stress, 51.43% for generalized anxiety, and 17.8% for aggression. Suicidal ideation was reduced by 47.9%. All results were highly significant. A combination of oxaloacetate and vitamin C supplementation helped to alleviate depression, anxiety, perceived stress, aggression, and suicidal ideation symptoms associated with PMS. ClinicalTrials.gov NCT03509714.
The means by which vaginal microbiomes help prevent urogenital diseases in women and maintain health are poorly understood. To gain insight into this, the vaginal bacterial communities of 396 asymptomatic North American women who represented four ethnic groups (white, black, Hispanic, and Asian) were sampled and the species composition characterized by pyrosequencing of barcoded 16S rRNA genes. The communities four were dominated by Lactobacillus iners, L. crispatus, L. gasseri, or L. jensenii, whereas the fifth had lower proportions of lactic acid bacteria and higher proportions of strictly anaerobic organisms, indicating that a potential key ecological function, the production of lactic acid, seems to be conserved in all communities. The proportions of each community group varied among the four ethnic groups, and these differences were statistically significant [χ(2)(10) = 36.8, P < 0.0001]. Moreover, the vaginal pH of women in different ethnic groups also differed and was higher in Hispanic (pH 5.0 ± 0.59) and black (pH 4.7 ± 1.04) women as compared with Asian (pH 4.4 ± 0.59) and white (pH 4.2 ± 0.3) women. Phylotypes with correlated relative abundances were found in all communities, and these patterns were associated with either high or low Nugent scores, which are used as a factor for the diagnosis of bacterial vaginosis. The inherent differences within and between women in different ethnic groups strongly argues for a more refined definition of the kinds of bacterial communities normally found in healthy women and the need to appreciate differences between individuals so they can be taken into account in risk assessment and disease diagnosis.
Oral contraceptive (OC) use has been linked to increased risk of breast cancer, largely on the basis of studies conducted before 1990. In the Case-Control Surveillance Study, a US hospital-based case-control study of medication use and cancer, the authors assessed the relation of OC use to breast cancer risk among 907 case women with incident invasive breast cancer (731 white, 176 black) and 1,711 controls (1,152 white, 559 black) interviewed from 1993 to 2007. They evaluated whether the association differed by ethnicity or tumor hormone receptor status. After control for breast cancer risk factors, the multivariable odds ratio for 1 year or more of OC use, relative to less than 1 year of use, was 1.5 (95% 1.2, 1.8). The estimates were similar within age strata (<50 years and >or= 50 years). The odds ratios were larger for use within the previous 10 years, long-duration use, and black ethnicity, but these differences were not statistically significant. The association of OC use with breast cancer risk did not differ according to the estrogen or progestogen receptor status of the tumor. These results suggest that OC use is associated with an increased risk of breast cancer diagnosed in recent years.
Sexual dysfunction is a common disorder among women, especially during menopause. Metabolic syndrome is a multifactorial disease that, according to previous studies, there is a relationship between the metabolic syndrome and sexual dysfunction among women. The aim of this systematic review and meta-analysis is to obtain the prevalence of Female Sexual Dysfunction (FSD) among women with metabolic syndrome, and to analyze available related evidence. In this systematic review and meta-analysis, the keywords of MeSH, female sexual dysfunction, FSD, metabolic syndrome were searched in PubMed, Web of Science, Scopus, Science Direct and Google Scholar. The searches were conducted without a lower time limit and until May 2022. The prevalence of FSD among women with metabolic syndrome was found to be 39.3% (95% CI: 28.3-51.5). In the subgroup analysis and in the review of 4 studies, the prevalence of sexual dysfunction in postmenopausal women with metabolic syndrome was 49.8% (95% CI: 26.1-73.6). Analyzing the results of the meta-regression test in examining the effect of the three factors of sample size, year of the study, age, and BMI of the patients on the heterogeneity of the meta-analysis, showed that with the increase of the sample size, the prevalence of sexual dysfunction among women with metabolic syndrome decreases (p < 0.05). Moreover, the prevalence of sexual dysfunction among women with metabolic syndrome increases (p < 0.05) with the increase in the years of conducting studies and the mean of age of women with metabolic syndrome. Also, with increasing mean of BMI of female patients with metabolic syndrome, the prevalence of sexual dysfunction in these women also increases (p < 0.05). Female sexual dysfunction is a global health problem that can affect women's life to a great extent. Metabolic syndrome, which is a set of factors such as obesity, high blood pressure, and diabetes, affects sexual dysfunction in women. From this study, it can be concluded that there is a close relationship between metabolic syndrome and female sexual dysfunction.