Rats on 22.5‐Hr Light:Dark Cycles Have Vaginal Opening Earlier Than Rats on 26‐Hr Light:Dark Cycles

@article{Lehrer1986RatsO2,
  title={Rats on 22.5‐Hr Light:Dark Cycles Have Vaginal Opening Earlier Than Rats on 26‐Hr Light:Dark Cycles},
  author={S Lehrer},
  journal={Journal of Pineal Research},
  year={1986},
  volume={3}
}
  • S. Lehrer
  • Published 1 October 1986
  • Biology, Psychology
  • Journal of Pineal Research
Rats on 22.5‐hr light:dark cycles had vaginal opening significantly earlier than rats on 26‐hr light:dark cycles. This finding might explain the early menarche in blind girls: Their circadian rhythms, like those of rats on 22.5‐hr cycles, might be more rapid than normal. Thus a set number of cycles can occur in a shorter time than usual, allowing puberty to take place early. 
Mechanism of programmed obesity: altered central insulin sensitivity in growth-restricted juvenile female rats
TLDR
Despite feeding, IUGR offspring exhibit a persistent state of orexigenic stimulation in the ARC nucleus and relative resistance to the anorexigenic effects of icv insulin, which suggest that impaired insulin signaling contributes to hyperphagia and obesity in IugR offspring.
Continuation of gradual weight gain necessary for the onset of puberty may be responsible for obesity later in life.
  • S. Lehrer
  • Medicine, Biology
    Discovery medicine
  • 2015
TLDR
A better understanding of the mechanism of puberty and pre-pubertal weight gain could provide new insights into obesity and diseases associated with obesity such as type 2 diabetes, dyslipidemia, hypertension, heart disease, depression, etc.
Mechanism of Action of GnRH Analogues in Sexual Maturation and Function
TLDR
This work has confirmed the importance of GnRH secretion for the initiation of sexual maturation and the regulation of pituitary gonadotropin secretion in the control of sexual functions.
Early Marriage, Age of Menarche, and Female Schooling Attainment in Bangladesh
Using data from rural Bangladesh, we explore the hypothesis that women attain less schooling as a result of social and financial pressure to marry young. We isolate the causal effect of marriage
Master Degree in Specialized Economic Analysis (Economics of Public Policy) “Women’s status in Rural Bangladesh: Exploitation and Empowerment”
IN ENGLISH (100 words): Using household survey data from rural Bangladesh, we explore determinants of domestic violence. We propose two hypotheses: first, women suffer more domestic abuse as a result
Early Marriage and Female Schooling in Bangladesh
This paper provides empirical evidence of the influence of adolescent marriage opportunities on female schooling attainment and gives predictions of the impact of imposing universal age-of-consent

References

SHOWING 1-10 OF 19 REFERENCES
Blind man living in normal society has circadian rhythms of 24.9 hours.
A psychologically normal blind man, living and working in normal society, suffered from a severe cyclic sleep-wake disorder. Investigations showed that he had circadian rhythms of body temperature,
Puberty and resonance: a hypothesis.
  • S. Lehrer
  • Biology
    The Mount Sinai journal of medicine, New York
  • 1983
TLDR
The frequency of the arcuate nucleus does not have to slow as much to resonate with the same harmonic of the suprachiasmatic nucleus rhythm, and puberty can occur at an earlier age.
Neuroendocrine changes characteristic of sexual maturation.
TLDR
It is probable that stress and underweight act in blocking the pubertal development through the action of neurotransmitters, in particular catecholamines and beta-endorphins.
Neuroendocrine changes characteristic of sexual maturation.
TLDR
It is probable that stress and underweight act in blocking the pubertal development through the action of neurotransmitters, in particular catecholamines and beta-endorphins.
Blindness, biologic rhythms, and menarche.
Pineal function relation to absolute darkness and sexual maturation.
  • R. Relkin
  • Chemistry, Medicine
    The American journal of physiology
  • 1967
Hamsters through time's window: temporal structure of hamster locomotor rhythmicity.
TLDR
The temporal patterns of running-wheel locomotor activity of a group of 15 golden hamsters (Mesocricetus auratus) are described in detail and provide the basis for a hypothetical multioscillator framework underlying locomotory activity.
...
...