Breast cancer is one of the most common cancers and the first-leading cause of cancer deaths among women in the world. Indeed, breast cancer is ranked as the first malignancy among Iranian women. Breast density, defined as the percentage of fibro glandular breast tissue in mammographic images, is one of the known risk factors for breast cancer. Studies have shown that increased breast density is associated with significant increase in breast cancer risk. Therefore, it is assumed that breast density should be associated with other breast cancer risk factors. The aim of this study was to assess the epidemiologic distribution of breast density of the patients in a referral center in Iran, and to evaluate the association of high breast density and breast cancer risk factors and other factors that may possibly affect the mammographic density according to previous studies.
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Objective: Puberty is a critical time between childhood and adulthood. Many studies have reported that the mean age of breast development is decreasing. The aim of this study was to provide updated data on the pubertal development of girls and to evaluate precocious puberty in our population. Methods: This cross sectional study was conducted in 6 to 16 year old school girls during in Qazvin. A questionnaire including demographic data, anthropometric measurements, secondary sexual characteristics, menarche status and its onset was filled out for every participant. The mean age 10th — 90th percentile of B2 and PH2 were 9. Mean age of menstruation was
Pubertal Characteristics in Girls of Qazvin Province, Iran
There are few studies concerning the age of puberty in Iranian children. The aim of the present study was to evaluate the age at the onset of puberty in Iranian schoolgirls and schoolboys living in Tehran. Samples were collected on the basis of a multistage probability sampling.
This study aimed to compare the timing of puberty between various geographic locations and different ethnicities. This national survey was conducted in 20 provinces in Iran. Healthy Iranian girls were selected from public schools using cluster random sampling. A total number of 30 clusters including girls, aged 6. In order to compare different areas, the national classification of the provinces based on climate, ethnicity, geographic locations, and socioeconomic variables were used.