No specific precautions for pregnant women appear on the label for R.I.P. Fleas Extra. However, because treating an entire house correctly can be quite labour-intensive (requiring items of heavy furniture to be moved, vacuuming etc.) it is probably advisable to allocate the spraying to another person in the household. Immediately after spraying, open windows and ventilate the room for at least 1 hour. Make sure all spray mist has settled and all surfaces are dry before allowing any persons (including pregnant women) to re-enter the room. Read the label before use and adhere to the safety advice.