«Ultimately this reinforces the importance of including
age of menarche in many more studies.»
Through this effort the mutation was also found to increase the risk of squamous cell carcinoma of the skin and biliary tract cancer as well as to cause blood electrolyte imbalance and late
onset of menarche.
Emily Stapley summarises a Mendelian randomisation study that investigates associations between the
timing of menarche with depressive symptoms and depression in adolescence.
When looking for correlations between the micronutrient levels and physical fitness, they took into account the adolescents» age, time of year, latitude of the city they lived in, body mass index, age
of menarche in females, and amount of regular physical activity (using accelerometers).
However, this shouldn't hinder efforts to understand the
biology of menarche and menopause and eventually target them with drugs, he says.
Going through the rites of passage: Timing and
transition of menarche, childhood sexual abuse, and anxiety symptoms in girls
The beverages industry says neither this study nor the body of science show that sugar - sweetened beverage consumption causes early
onset of menarche.
The association between
timing of menarche and depressive symptoms at 10.5, 13 and 14 years was examined within a structural equation model.
«In this study, an inverse association was observed between the risk of endometrial cancer for women with an MMR gene mutation and later
age of menarche, increased parity, and use of hormonal contraceptives.
«Neither this study nor the body of science shows that sugar - sweetened beverage consumption causes early onset
of menarche.
It may lead to the early onset
of menarche and early development of breast tissue in developing girls.
The mutation was also found to dramatically increase the risk of squamous cell carcinoma of the skin, biliary tract cancer, and to promote an imbalance in blood electrolytes and late onset
of menarche.
A growing number of studies suggest a link between timing
of menarche and risk of depressive symptoms in adolescence, but few have prospectively examined the emergence of depressive symptoms from late childhood into adolescence.
Surprisingly, childhood depressive symptomatology predicted later age
of menarche, although the magnitude of this effect was small.