The purpose of this study was to assess the effect of “good, rational thoughts” (called “prayer”) on the fetus and the mother during the 3rd trimester of pregnancy. The good thoughts (prayer) are radiated, in the form of recording, from Swami Vijnananand, a person who was a selfless, benevolent, philosopher, thinker, who devoted his entire life for social good and totally isolated from the families undergoing the experiment. In all, 1850 cases were critically analyzed, in this study. It was hypothesized that, radiating prayer by Swami Vijnananand to the fetus and mother would be effective, as it has consciousness. The heart rate of fetus and pulse-rates of the pregnant mother were recorded in all 1850 cases, before and after the prayer was recited. The heart rate is a sensitive indicator of an individual’s emotional status and needs. The authors conclude that radiation of such prayer does have a positive impact on the heart rate of the fetus and the pulse-rate of mother. A pattern of stabilization is observed for both the fetus and the mother. In cases where the initial pulse-rate before prayer was far below normal it tended to increase after prayer. On the other hand, where the initial pulse- rate before prayer was high, it came down in the normal range after prayer. And for those cases where the initial pulse rate was in the normal range it remained unaffected after prayer.