منابع مشابه
Environment, epigenetics and reproduction
A conference summary of the third biannual Kenya Africa Conference "Environment, Epigenetics and Reproduction" is provided. A partial special Environmental Epigenetics issue containing a number of papers in Volume 3, Issue 3 and 4 are discussed.
متن کامل1 Reproduction and environment
Two factors play an important part in determining the optimum number of offspring that any species should produce each pregnancy, the optimum number for the fetuses to develop normally in the uterus, and the ability of the mother to adequately suckle the newborn to the point where they are able to survive the rigors of the environment. The first is of prime importance and is determined by a rel...
متن کاملEnvironment, human reproduction, menopause, and andropause.
As the hypothalamic gonadotropin-releasing hormone (GnRH) pulse generator is an integrator of hormonal, metabolic, and neural signals, it is not surprising that the function of the hypothalamogonadal axis is subject to the influence of a large array of environmental factors. Before puberty, the central nervous system (CNS) restrains the GnRH pulse generator. Undernutrition, low socioeconomic st...
متن کاملProduction, Management and the Environment: Reproduction and Behavior
d before initiating treatments. Cows were blocked by lactation number and assigned randomly to 3 treatments consisting of variations of the Ovsynch protocol. Cows in Cosynch-48 and Ovsynch received injections of GnRH 7 d before and 48 h after a PGF injection. Fixed-time inseminations (TAI) were made at the time of the second GnRH injection (0 h; Cosynch-48) or 24 h (Ovsynch). Those in Cosynch-7...
متن کاملProduction, Management and the Environment: Reproduction and Health Management
The objective was to evaluate whether addition of EAZI-BREED CIDR Cattle Inserts (CIDR) to the Ovsynch program increases first service pregnancy rate (PR) in lactating dairy cows. The study was conducted in 5 dairies in Central Mexico. Cows were inseminated from June through September, 2001. Within trial site and within parity, cows were assigned to either an Ovsynch (n=255) or an Ovsynch-CIDR ...
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: Nature
سال: 1920
ISSN: 0028-0836,1476-4687
DOI: 10.1038/106532b0