1 PGD, preimplantation genetic diagnosis, involves removing a cell from an IVF embryo to test it for a specific genetic condition (cystic fibrosis, for example) before transferring the embryo to the uterus.  PGS, preimplantation genetic screening, is the proper term for testing for overall chromosomal normalcy in embryos. PGS is not looking for a specific disease diagnosis - it is screening the embryo for normal chromosome copy number.
Taking too much Lamictal at the start of treatment may increase your risk of a severe life- threatening skin rash. You may need frequent blood tests to help your doctor make sure you are taking the right dose.
Unfortuantely, Depakote recently pooped out on me, so now I'm taking 100mg Lamictal and it's working great for my depression. I didn't have any sleepiness or other side effects either. I agree with Kat that you might want to give Lamictal a try if you're looking for a mood stabilizer that does not cause drowsiness.