(07-08-2010, 10:42 AM)Breast Wrote: I think i have some thing you people i havent read from some book but it is my personal search that Xenoestrogens are novel, industrially made compounds, that have estrogenic effects and differ chemically from ancient, naturally occurring estrogenic substances produced by living organisms. Their potential ecological and human health impact is under study.
As a heterogeneous group of chemicals that are hormonally active agents, xenoestrogens are similar to other estrogens , such as phytoestrogens (estrogenic substances from plants) and mycoestrogens (estrogenic substances from fungi, which can be considered as one type of mycotoxin). Xenoestrogens include pharmacological estrogens (estrogenic action is an intended effect, as in the drug ethinyl estradiol used in contraceptive pill), but other chemicals may also have estrogenic effects. Xenoestrogens have been introduced into the environment by industrial, agricultural and chemical companies and consumers only in the last 70 years or so, but archiestrogens have been a ubiquitous part of the environment even before the existence of the human race.The sex ratios are female biased because xenoestrogens interrupt gonadal configuration causing complete or partial sex reversal. When comparing adjacent populations of white sucker fish, the exposed female fish can have up to five oocyte stages and asynchronously developing ovaries versus the unexposed female fish who usually have two oocyte stages and group-synchronously developing ovaries. Previously, this type of difference has only been found between tropical and temperate species
nvm, re-reading what you said The Fishy thing makes sence now
thanx for the info