The term biological clock is usually used by physicians and psychologists to refer to the declining fertility, increasing risk of fetal birth defects and alterations to hormone levels experienced by women as they age. Female fecundity declines slowly after the age of 30 years and more rapidly after 40 and is considered the main limiting factor in treating infertility. However, there are several...

BACKGROUND Use of psychoactive substances (PAS) early in school age implies drug dependence in later life. Although no studies have been conducted on undergraduate students of Hawassa University, a few studies in Ethiopia have reported that alcohol, khat, and cigarette are the commonly abused PASs among young high school/undergraduate university students. Therefore, this study was designed to e...

Rat liver cytosolic alcohol dehydrogenase (ADH) is the principal enzyme which catalyzes the oxidation of ethanol. ADH activity is known to be significantly higher in females than in males. However, the precise mechanism of the sex-difference in ADH activity is uncertain. Recently, we have shown that the inhibitory action of androgen and the slight facilitatory actions of progestin and estrogen ...

background: studentship period is a time when most behavioral traits are being created and fixed; this is a special time when students may start smoking. thus in the present research, prevalence of smoking in university students in iran has been evaluated. materials and methods: having extensively explored iranian and international databases (sid, iranmedex, magiran, medlib,irandoc, pubmed, goo...

The purpose of this study was to evaluate smoking prevalence and factors associated with smoking among students at the Physical Education and Sports School of Istanbul University. A cross-sectional study was performed on total of 373 students who have been continuing their education at the school from February to March 2011. A total of 166 responders were male (44.5%) and 207 responders were fe...

Up until 1976, ACT school students seeking tertiary admission took the NSW HSC examination, and so gained tertiary admission qualifications on the same academic footing as their NSW contemporaries. In terms of academic performances (i.e. educational measurements), the distribution of HSC aggregate scores of the ACT students was effectively the same as the distribution of their NSW contemporarie...

A prospective study of self-poisoning and self-injury in the Oxford area for 1972-73 and a retrospective study for 1969 has shown the following: (a) The number of admissions to a general hospital following self-poisoning and self-injury has increased by approximately 45% in 3 1/2 years. The increase is more marked in women than in men. (b) When compared with a previous study the incidence in Ox...

OBJECTIVE Present first published data detailing high-risk behaviors of adolescent high school students (HSS) with extreme obesity (BMI ≥ 99th percentile for age and gender) compared with healthy weight peers (5th-84th percentile). METHODS The 2007 Youth Risk Behavior Survey was used to compare HSS with extreme obesity (N = 410) and healthy weight peers (N = 8669) in their engagement in (1) t...

In order to assess the prevalence and correlates of tobacco use among school students (10-12 years), information on tobacco use and socio-demographic variables was collected from 1626 students (male 1027) using a questionnaire. Bivariate and multiple regression analysis were done. Ever users in the sample were 16.6% (95 % CI 14.8, 18.4) and current users were 5.1 % (95 % CI 4.1, 61). Current us...