Answer: You should expect no problems for the health of the pregnant woman or the unborn child from using Dulux products, provided they are used in the correct manner i.e. according to the instructions on the can.
If it is the first three months of pregnancy, using solvent-based (white spirit-based) products could lead to nausea from the smell. Water-based alternative products should be used if possible. If the use of solvent-based products cannot be avoided, maximum ventilation should be used.
When pregnant, excessive exertion e.g. bending/stretching or repetitive lifting to apply paint, should be avoided. Excessive exertion has been linked to problems in pregnancy.
So, the general message is: ventilate the room really well, do a little painting at a time and see how you get on. If OK, do a bit more.