Puberty News and Research

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Puberty is the maturation stage a person goes through when they develop secondary sexual characteristics. Usually, puberty occurs between the ages of 8 and 12 years in girls and between 9 and 14 years in boys.

Evolution explains age of puberty

Children aged 10 and 11 are sexually mature, and neither they nor society are suitably prepared for the implications of that.

30 Nov 2005

Olfactory epithelium plays a critical role in pheromone detection

Howard Hughes Medical Institute researchers have discovered that pheromones essential for mating behavior in mice are recognized by the nose and not by the vomeronasal system, as researchers had long suspected.

14 Nov 2005

First step in exploring the GnRH reproduction-related circuitry in the brain

Howard Hughes Medical Institute researchers have discovered a vast network of neurons in the brain of mice that governs reproduction and controls the effects of reproductive status on other brain functions.

14 Nov 2005

Hormonal clue to higher asthma rates in women

According to experts hormone fluctuations resulting from life cycle changes are a factor in higher rates of asthma, more frequent emergency department visits, and higher hospital admission rates in women than in men.

7 Nov 2005

Fertile women most attractive to men

According to researchers at the University of St Andrews, Scotland, women with high levels of the sex hormone oestrogen have prettier faces.

2 Nov 2005

Ethnic differences in cardiovascular risk factors

Heredity plays a major role in determining the blood lipid profile and heart rate variability of blacks and whites, two major risk factors for coronary artery disease, researchers say.

16 Oct 2005

For post-menopausal women light to moderate exercise is best

A British expert says that although exercise is important for reducing the risk of osteoporosis and heart disease in post-menopausal women, too much exercise in pre-menopausal women may actually increase the risks.

5 Sep 2005

Early menstruation is not by itself a risk factor for later obesity

Although overweight girls are more likely to start their periods earlier than their peers who are at or below normal weight, early menstruation is not by itself a risk factor for later obesity, according to a long-term study released this week.

13 Aug 2005

Signs of atherosclerosis seen in apparently healthy young adults

Young adults who seem to be healthy, but have a clustering of heart disease risks factors known as metabolic syndrome, tend to have signs of thickening of their carotid artery walls, which is an early indication of atherosclerosis, according to a new study in the Aug 2, 2005, issue of the Journal of the American College of Cardiology.

2 Aug 2005

Fertility boost for testicular cancer patients

The vast majority of men who try to have a family, following treatment for testicular cancer, are able to father children - according to a report published today in the British Journal of Cancer.

21 Jul 2005

Important role of early experience in shaping neuronal development

Scientists at New York University School of Medicine reveal the important role of early experience in shaping neuronal development and brain plasticity in a new study published in the July 14 issue of the journal Nature.

14 Jul 2005

Scientists reveal the important role of early experience in shaping neuronal development

13 Jul 2005

Fragile-X-syndrome research

The fragile-X-syndrome is the most common hereditary form of mental retardation and occurs much more often in boys than in girls.

20 Jun 2005

Transplantation of spermatogonial stem cells isolated from leukemic mice restores fertility without inducing leukemia

While more than 70% of patients survive childhood leukemia, curative chemotherapy can often irreversibly impair the formation of spermatozoa, causing infertility in males.

16 Jun 2005

Adolescents who are lethargic, cranky and forgetful may have chronic sleep deprivation

Adolescents who are lethargic, cranky and forgetful may have a common ailment: chronic sleep deprivation. But some tired teens may actually have a medical condition such as depression, insomnia, narcolepsy or sleep apnea, warns a new report in Pediatrics.

6 Jun 2005

Children 14 and younger should not sit in the front passenger seat of cars equipped with air bags

The study, "Effects of Child Age and Body Size on Serious Injury From Passenger Air Bag Presence in Motor Vehicle Crashes," will be published in the June 6 edition of the American Academy of Pediatrics' journal Pediatrics.

6 Jun 2005

Suppression of growth hormone and related compounds beginning in early adulthood may delay the onset or progression of several types of cancer

A modest suppression of growth hormone and related compounds beginning in early adulthood may delay the onset or progression of several types of cancer, researchers from Wake Forest University School of Medicine and other centers reported today at ENDO 2005, the annual meeting of the Endocrine Society, in San Diego.

5 Jun 2005

Gene research may help explain how adorable children become surly teenagers

University of Utah researchers showed that a fruit fly gene is crucial for determining when juveniles begin to mature into adults, and how the transformation initially proceeds. Understanding this process in humans may help explain how adorable children become surly teenagers.

3 Jun 2005

Breastfeeding is as good for children's blood pressure as exercise and dietary salt restriction

Breastfeeding is as good for children's blood pressure as exercise and dietary salt restriction, according to research from Bristol University published in the Archives of Disease in Childhood. The longer the period of breastfeeding, the lower the blood pressure reading, the research found.

30 May 2005

Chemicals in food packaging linked to breast cancer

Chemicals found in some food packaging materials have been shown in a new study to affect the development of breast tissue in mice, which suggests, say scientists, that women exposed to such chemicals, which mimic female hormones, may be at increased risk of breast cancer.

30 May 2005