An article in Natural Health reviewing our knowledge of the effects of oestrogenics* on mammals gave the following advice on protecting ourselves:

Eat organic foods Men who eat high levels have far higher sperm counts

Eat fibre Fibre reduces the body's availability of cholesterol, which (a) is required for producing the female hormone oestrogen, and (b) prevents absorption of oestrogenic chemicals into the bloodstream

Eat crucifers, like broccoli, brussel sprouts, cabbage, cauliflower, mustard greens and turnips. They contain a chemical compound called indole-3-carbinol which encourages oestrogen to metabolise into a non-toxic form. In one study 57 out of 80 women put onto a diet including one third of a head of cabbage a day showed improvements in their oestrogen metabolite ratios within five days

Fill up on phyto-oestrogens
Many plants contain phyto-oestrogens which are benign and displace toxic forms of oestreogen in the body. High levels of phyto-oestrogens are a marker for low risk of breast cancer. Women in a small village south of Kyoto in Japan were found to have phyto-oestrogen levels one hundred to a thousand times higher than those found in American or Finnish women, and the lowest incidence of breast cancer. All soy products - tofu, miso, tempeh, soya milk - are rich in phyto-oestrogens

Eat vegetarian A study of ten vegetarian premenopausal women found that they excreted 2-3 times as much oestrogen as their non-vegetarian counterparts. Meat eaters are more vulnerable to breast and testicular cancers

Avoid plastic food packaging Oestrogenic chemicals in the plastic leach into the food. Choose foods packaged in (unbleached, free of dioxins) paper, or glass

Increase intake of antioxidants, which protect sperm from toxic environmental chemicals. Ensure a good intake especially of vitamins A, C, E and selenium

* chemical compounds which mimic the effects of the female hormone oestrogen