There’s a belief that pregnant women naturally brings luck to the house and drives away negative energies. Well, generally speaking this is a myth.
Pregnant women doesn’t bring luck per se but it’s more of an indication or omen that good luck is about to come your way, and this is true only if you bump into a pregnant women who doesn’t live with you. If you have a problem and while thinking about it you bumped into a pregnant woman, or open the TV and saw a pregnant woman then it’s a very good sign that whatever problem you’re going through is going to turn out fine.
Second, having pregnant woman in the house will bring good luck and drive away negative energies is very much true in the olden times, but, I’m afraid that while it may still have some truth to it, it is not because of the pregnant woman itself but more of the process of giving birth.
What brings luck is the yang energy brought about by the process of giving birth , which in the olden times usually happens at home. It’s the blood spilled in the process of birth that cleanses the house of the woman from negative energies and/or evil spirits thus cleansing the house. One other thing that brings luck to the house is the fresh and pure yang energy of a healthy baby.