Hi..I transferred 4aa embryo first and it ended in chemical within 2 days after showing BFP. Second embryo transfer 4ab was BFN. I have remaining 4bb and 4bc. I am planning to transfer both and I don't want to do PGS now for those 2 embryos at this stage as it is already frozen (though it is technically possible to do). I am not sure if my thinking is correct. Need some advice pls.