Answer
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this fatwa:
If there is a guarantee that the preserved embryos would be used for your use while you are married and alive, then there is no need to discard it.
In responding to your question, Sheikh Ahmad Kutty, a senior lecturer and an Islamic scholar at the Islamic Institute of Toronto, Ontario, Canada, states:
If there is a guarantee that the preserved embryos would be used for your use while you are married and alive, then there is no need to discard it. However, if you have concerns or doubts, then you ought to insist that the embryos should be discarded.
The Shariah does not allow for surrogate motherhood or IVF unless it is done between the married spouses while they are alive. The Prophet (peace be upon him) said, “Halal is clear, and Haram is clear; there are some doubtful cases. Whoever shuns the doubtful is better enabled to guard his faith and honor.”
Almighty Allah knows best.