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988
[Growth rate and development in feed restricted female rats]
Leda Ulson Mattos1, Hisako Kajiyama2, Sandra Megrich3
1Professor Titula do Departamento de Enfermagem Médico-Cirúrgica da Escola de Enfermagem da USP - disciplina Nutrição e Dietética Aplicadas à Enfermagem.
Revista Da Escola De Enfermagem Da U S P
|July 27, 2017
Summary
Feed restriction in female rats delayed sexual maturation, indicated by later vaginal opening and first estrus. However, body weight at first estrus did not differ between feed-restricted and well-fed groups.
Area of Science:
- Reproductive biology
- Animal physiology
- Endocrinology
Context:
- Investigating the impact of nutritional status on reproductive development in female rats.
- Comparing growth and maturation timelines between feed-restricted and control groups.
Purpose:
- To determine the effect of feed restriction on the timing of sexual maturation (vaginal opening and first estrus) in female rats.
- To assess body weight at the onset of puberty in relation to nutritional intake.
Summary:
- Thirty feed-restricted female rats were studied from weaning to first estrus, with age and weight measured directly.
- Compared to well-fed controls, feed-restricted rats exhibited significantly delayed mean ages at vaginal opening and first estrus.
- Despite the delayed maturation, average body weight at first estrus was comparable between feed-restricted and well-fed groups.
Impact:
- Highlights the critical role of nutrition in regulating the onset of puberty in mammals.
- Provides insights into the physiological mechanisms linking energy balance and reproductive timing.
- Informs potential nutritional strategies for managing reproductive health in animal models.
