Hi thank you. I have successful implantation before where 1 was terminated at week 22 and another time I Mc at week 18. All due to genetic problems. Did another harvest n did pgd, but this batch is Not as strong as the first batch. My last FET using the fresh batch of tested embryos ended with Low hcg (14units n dropped by half within 3 days). Hence seems like embryo issue rather than environment issue . My blasts downgraded after thawing to BC and another one not rated (so bad until the embryologist doesn’t want to comment I guess)Sorry to hear that. Perhpas you might want to go for checks if you have not done so to see if there's any underlying issues e.g. sticky blood, autoimmunity, vit D deficiency etc as these can cause MC and/or hinder implantation. You can either see Dr Choolani or Dr Sheila Vasoo. You can google and find out more about them.