May improve fertility

According to several studies, women who consume diets high in soy may have better fertility. In one research, women who consumed more soy isoflavones were 1.3–1.8 times more likely to become pregnant after receiving fertility treatments than those who consumed fewer soy isoflavones. Men might not benefit from increased fertility in the same ways, though. In a different research, it was shown that soy meals may provide some defense against the effects of bisphenol A (BPA), a substance included in certain plastics and thought to lower fertility. Nevertheless, not all studies have shown improvements in fertility.

For instance, one review indicated that consuming 100 mg of soy isoflavones daily may lower levels of reproductive hormones and ovarian function, two crucial components of fertility. Furthermore, according to another study, women who consume more than 40 mg of soy isoflavone per day maybe 13% more likely to have reproductive problems than those who consume less than 10 mg. But according to the majority of research conducted to date, eating a diversified diet that includes 10–25 mg of soy isoflavones per day—and maybe even up to 50 mg—does not appear to have any negative effects on ovulation or fertility.