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.
How to Take Lamictal. Lamictal has the most complicated dosing instructions and schedules to increase the dosage (titration) of any crazy med. They take up 9 pages of the PI sheet. 1  Find a med that works.  Once your symptoms are under control, decide if the side effects suck so much you want to be on a different med.