منابع مشابه
Reproduction: a global nutritional challenge
In developing countries women undergo many cycles of pregnancy and lactation during their reproductive lifespan. Reproductive cycles often start at an early age and take place at short intervals. Between the ages of 15 and 40 years a typical woman will spend half her time pregnant and lactating (World Health Organization, 199 1). Globally, there were over 138 million births in 1994 and the vast...
متن کاملNeuroendocrine integration of nutritional signals on reproduction.
Reproductive function in mammals is energetically costly and therefore tightly regulated by nutritional status. To enable this integration of metabolic and reproductive function, information regarding peripheral nutritional status must be relayed centrally to the gonadotropin-releasing hormone (GNRH) neurons that drive reproductive function. The metabolically relevant hormones leptin, insulin a...
متن کاملNutritional controls of beef cow reproduction
The livestock industry and animal scientists have long recognized the importance of proper nutrition for cattle to achieve reproductive success. Timely resumption of estrus following parturition is a major milestone that a cow must reach for optimal reproduction. Dynamic interplay among all strata of the hypothalamo-hypophyseal-ovarian axis occurs during the cow’s transition from postpartum ane...
متن کاملPhysiology and Endocrinology: Nutritional Regulation of Reproduction
cass traits as barrows fed the C-SBM diet (P > 0.10). In Exp. 2, 60 barrows (initial and final BW of 74.6 and 104.5 kg, respectively) were used to estimate the dTrp requirement. The levels of dTrp used in Exp. 2 were 0.06, 0.08, 0.10, 0.12, or 0.14%. Response variables were growth performance, PUN concentrations, carcass traits, and pork quality. The dTrp requirement was estimated to be 0.102%....
متن کاملEvolutionary origin of insect-Wolbachia nutritional mutualism.
Obligate insect-bacterium nutritional mutualism is among the most sophisticated forms of symbiosis, wherein the host and the symbiont are integrated into a coherent biological entity and unable to survive without the partnership. Originally, however, such obligate symbiotic bacteria must have been derived from free-living bacteria. How highly specialized obligate mutualisms have arisen from les...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Current Opinion in Insect Science
سال: 2015
ISSN: 2214-5745
DOI: 10.1016/j.cois.2015.08.003