A nutritional supplement known as FertilityBlend has "shown promise" in helping previously infertile women conceive, according to a study published in the April issue of the Journal of Reproductive Medicine, HealthDayNews/Connecticut Post reports (HealthDayNews/Connecticut Post, 4/30). The supplement contains folic acid; vitamins E, B6 and B12; iron; magnesium; zinc; L-arginine, an essential amino acid that benefits sexual and reproductive health; chasteberry, an herb that is thought to optimize ovulation; and green tea and selenium, antioxidants that may promote sexual wellness (Kaiser Daily Reproductive Health Report, 7/23/03). Stanford University School of Medicine researchers studied 30 women ages 24 to 46 who had been unable to conceive for six to 36 months. Researchers assigned the women to take the supplement or a placebo three times a day and measured each woman's progesterone levels, menstrual cycles and body temperatures. Women taking the supplement had more days during their menstrual cycle when their basal temperature was higher than 98.6 degrees Fahrenheit -- a sign of improved ovulation -- and higher levels of progesterone after taking the supplement for three months, while women taking the placebo had no noticeable changes in temperature or progesterone levels, according to the study. After five months, one-third of the women taking the supplement became pregnant and no one from the placebo group became pregnant (HealthDayNews/Connecticut Post, 4/30). An earlier trial of the supplement yielded similar results (Kaiser Daily Reproductive Health Report, 7/23/03). The trial received funding from Daily Wellness, which produces FertilityBlend, according to HealthDayNews/Connecticut Post (HealthDayNews/Connecticut Post, 4/30).