Pregnancy is a period when a woman experiences many changes. Negative psychosocial health level and poor prenatal attachment during pregnancy may lead to negative maternal behaviors, postpartum anxiety, and depression. A randomized controlled experimental study, published in the Indian Journal of Traditional Knowledge evaluated the effect of pregnancy yoga on the pregnant woman’s psychosocial health and prenatal attachment. In all, 63 pregnant women (primipara) in 14 to 26 weeks of their pregnancy, who did not have any chronic disease and a past yoga experience, and who had singular and spontaneous pregnancy were included in the study. All the paticipants were evaluated with Pregnant Information Form (PIF), Pregnancy Psychosocial Health Assessment Scale (PPHAS), and Prenatal Attachment Inventory (PAI). Women in the yoga group did yoga for 40 minutes two days a week for a period of 8 weeks under the supervision of one of the researchers and received routine antenatal care. The control group received routine antenatal care only. At the end of 8 weeks (post intervention), both the yoga group and the control group were re-evaluated using the PPHAS and PAI. The mean PPHAS scores of the experimental group were found to be significantly higher than the scores of the control group. At the beginning of the study, the PAI mean scores were similar for both the groups. However, at the end of intervention, the scores of the experimental group were significantly higher than the control group. The mean anxiety and stress subscale score was higher in the experimental group as compared to the control group. When the mean anxiety and stress subscale score increased, anxiety and stress level decreased. Prenatal yoga was thus found to be an effective way of improving the pregnant women’s psychosocial health level and prenatal attachment.