I had heard of "Mommy Brain" before and figured it had something to do with post-delivery hormones. Apparently, it is not hormone related and I have a very bad case of it!
What is Mommy Brain? It is a condition brought on by the onset of children. It impacts a mother's ability to hear anything as her ears become finely tuned and specialized to hear only the cry of a baby (or to tune it and everything else out when absolutely necessary for survival). It is destructive to both short and long-term memory as all of her brain's processing power is dedicated instead to the particulars of creating a safe, nurturing, yet stimulating environment for a developing child to thrive in. It also severely limits a mother's speech as it becomes impossible for her to complete any single thought, let alone articulate it.
In short, you know you have "Mommy Brain" if you cannot complete a...now what was I saying??