What is the Catholic view on frozen embryos

We all know that IVF fertilization is against the catholic teaching. Recently I found out that when the treatment is carried out, some of the embryos are frozen for the future implantation in case if the couple want more children. My question is: **Do the catholic church allow couples to access the sacraments if they have children from IVF**? And if the couple realize the wrongness of IVF and have embryos frozen, **what do they have to do with them according to the teaching**? Let them die or try to implement them in woman's womb? Both, I see as wrong decision.