Hopeful Ng,
im quite surprised they blasted all the 13 fertilised embbies. i personally prefer wat KKH does as they only took 5 to blast each time..the balance freeze at D2..those 5 that they blasted will transfer 2..if all make it , freeze the balance 3.. if only 1 make it, then transfer only 1 ... but its risky to blast all 13 embbies before if all cannot make it, all collapsed together. and actually blastocyst when freeze, during thawing is even hard to survive than those D2 embbies. So usually they die during thawing.. but of cos also got survival..hmm, its very wasteful leh..if they freeze 8 and only blast 5, u still can do FET wor.. cos D2 embbies also can work better in our womb than D5 blasto on lab environment.