biological clock

(University of Michigan) For many women, including the growing number who choose later-in-life pregnancy, predicting their biological clock's relation to the timing of their menopause and infertility is critically important.

The tick-tock of your biological clock may have just gotten a little louder. The number of genes under control of the biological clock in a much-studied model organism is dramatically higher than previously reported.

The new study implies that the clock may be much more important in living things than suspected only a few years ago.

Teenagers who excessively use their cell phone are more prone to disrupted sleep, restlessness, stress and fatigue.

When compared to subjects with restricted use of cell phones, young people with excessive use of cell phones (both talking and text messaging) have increased restlessness with more careless lifestyles, more consumption of stimulating beverages, difficulty in falling asleep and disrupted sleep, and more susceptibility to stress and fatigue.

Age at menopause may now be predicted more realistically according to a new study. The study revealed that anti-Müllerian hormone (AMH) levels are related to the onset of menopause and are able to specify a woman's reproductive age more accurately than chronological age alone.

The levels of AMH in the blood reflect the number of small follicles present in a woman's ovaries. This follicle stock enables reproduction by ensuring monthly ovulations.

Biologists, in research with implications for people suffering from seasonal affective disorder and insomnia, have determined that the eye uses light to reset the biological clock through a mechanism separate from the ability to see.

A newly discovered biological clock, or biological rhythm, controls many metabolic functions and is based on the circadian rhythm, which is a roughly 24-hour cycle that is important in determining sleeping and feeding patterns, cell regeneration, and other biological processes in mammals.

Why do rats live faster and die younger than humans? A newly discovered biological clock provides tantalizing clues.

This clock, or biological rhythm, controls many metabolic functions and is based on the circadian rhythm, which is a roughly 24-hour cycle that is important in determining sleeping and feeding patterns, cell regeneration, and other biological processes in mammals.

Using a systems biological analysis of genome-scale data from the model plant Arabidopsis, researchers have identified that the master gene controlling the biological clock is sensitive to nutrient status.

This hypothesis derived from multi-network analysis of Arabidopsis genomic data, and validated experimentally, has shed light on how nutrients affect the molecular networks controlling plant growth and development in response to nutrient sensing.

Scientists have acquired a more dynamic picture of events that underlie the functions of a bacterial biological clock.

New research shows how the simplest organism known to have a circadian clock keeps time and may enhance our understanding of how other organisms establish and govern chronological rhythms.