What is the ruling of Islamic law on a husband taking medication to strengthen sperm, and freezing fertilized eggs for two years for future use in an in-vitro fertilization process?

We previously discussed in-vitro fertilization (IVF) and its regulations, as well as the scholarly disagreement regarding the storage of the husband's sperm and the wife's eggs for later fertilization. The preponderant opinion is that storage is impermissible if fertilization is to occur during the husband's lifetime, while the marital relationship is ongoing, and in his presence. As for the absence of the marital relationship, there is a consensus on its impermissibility. There is no harm in medications added to strengthen sperm.