A.A.
Hi K.,
Pregnancy brain is indeed a real phenomenon. The brain shrinks approximately 8-10% in pregnancy due to hormones and redistribution of blood flow in the body. There is actually a study going on right now testing the memory of women in their 1st, 2nd, and 3rd trimesters to non-pregnant women.
The best way to go about dealing with the brain function issue is to figure out which hours of the day are most productive mentally, and really cash in on those hours. Make lists, keep a notebook in pocket at all times if it helps, and write things down before they escape the mind. The other thing is to take advantage of any opportunities to catch up on sleep. With 2 young children at home, this may be quite difficult, especially with a move coming up. It's important to try and find those moments to get those 20 minute power naps in. Pregnancy can be pretty exhausting.
If the pregnancies have been close together, then women may also be dealing with nutritional deficiencies that worsen the brain fog. It would be appropriate for a woman in this case to seek the help of a health care provider (someone who specializes in nutrition like a nutritionist, naturopathic physician, or dietician).