Saturday, May 19, 2012

This Just In: Contraception Is Bad For The Environment

Of course, these reports have been coming out for a long time, so it's really nothing new. Interesting that we haven't seen any of the "environmental protection" groups target the birth control industry for this sort of thing. It would be pretty weird to hear a story about the ELF or someone similar targeting Yaz distributors or some such. Part of me wonders which phenomenon has more evidence: the destructiveness of the pill or global warming.

Anyways, Zenit is the latest source:

While its impact is still being widely studied, there is no doubt that the exposure is occurring: multiple international studies have documented elevated levels of natural and synthetic hormones in drinking water, and one such study conducted in France noted that progestins in particular were more resistant to removal by water treatment methods, compared with other types of pharmaceuticals (3). 

Due to the accumulation of synthetic steroids in water, much of the research conducted on its impact has been done using water-dwelling vertebrates such as fish and frogs. An ever-increasing collection of studies report harmful effects of these hormones on aquatic vertebrates, particularly with regard to their reproduction, as would be predicted given the nature of the contaminants (4). One study focused on the effects of exposure to the progestin Levonorgestrel (LNG) on the frog Xenopus tropicalis. While the male reproductive system did not appear to be impaired, female tadpoles exhibited severe defects in the development of their ovaries and oviducts, rendering them sterile (5). 

While studies such as these cannot be taken as a direct assessment of the impact of environmental EDCs on humans, they do have certain advantages: the capability of controlling for the duration and concentration of exposure, and the fact that these animals’ life cycles are much shorter than those of humans, thus enabling multigenerational studies in far less time. Like the proverbial “canary in the coal mine,” animal studies can serve as early indicators of environmental conditions that may prove harmful to humans and direct our attention toward seemingly innocuous substances we encounter in the air we breathe, the food we eat, and, as in this case, our water supply. However, the effects of EDCs are not limited to water-dwelling frogs: female sterility resulting from early exposure to progestins has been reported in studies involving rats and mice, whose mammalian reproductive systems more closely resemble those of humans (6). The female reproductive system undergoes many key developmental changes in the early stages of life, and these changes are dependent on endocrine signaling events that are sensitive to contaminating environmental hormone exposure. A series of studies by a group at the National Institutes of Health (NIH) have demonstrated that mice exposed to phytoestrogens – plant estrogens such as those found in soy products – at key developmental time points exhibited impaired fertility (7). In contrast to mice, in which the critical period of time is during the neonatal period, the human female reproductive tract is undergoing development from prior to birth through adolescence. Therefore, it is necessary to evaluate the risk of exposure to EDCs across a broader window of time, beginning in the womb.

Go ahead and read the whole thing. It returns us to a point we made a couple of months ago. What kind of story would it take to get people to stop taking the pill? Environmental catastrophe? Sudden, instant, immediate death? Or nothing.

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