For a healthy pregnant woman, the sauna presents no risk to the mother or child. Fluid accumulation due to pregnancy such as  "swollen" hands or legs can be reduced by regular visits to the sauna. Purification of the body is encouraged by perspiration and increased kidney activity and this has a particularly beneficial effect on the mother's organism, which must also deal with the by-products of the baby's metabolism. The risk of thrombosis is reduced as well because the sauna stimulates blood circulation. The nervous tension that typically affects pregnant women can be reduced as a result of the positive action on the autonomic nervous system.