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.
If you take Lamictal and have Itching, find out what symptoms you could have in 1 year or longer. Join a support group for people who take Lamictal and have Itching. On eHealthMe you can find out what patients like me (same gender, age) reported their drugs and conditions on FDA since 1977.