A recent study found that Bisphenol-A, a common component in plastic articles (recycle codes 03 & 07) and used to line metal food and beverage cans, reduced the percentage of normally fertilized eggs by 50% during in vitro fertilization. Although further investigation is necessary this study shows that BPA can negatively impact reproductive health in women.
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According to a recent article published in the German magazine Natur (June 2010 issue) plastics with the recycle codes 02, 04, and 05 are currently still considered safe although studies are underway that might show some of those substances impacting the human organism negatively as well. Recycle codes 01, 03, 06, and 07 should be avoided.