Germany's Embryo Protection Act is fiendishly complicated - but has huge grey areas (and loopholes). The Act itself is highly restrictive but whilst the guidelines try to avoid the creation of surplus embryos, there are no specific rules on how to manage surplus embryos that are created
If any fertility nerds are interested these will get you banged up in Germany:
The Embryo Protection Act (Embryonenschutzgesetz) of 13 December 1990, section 1, provides that certain acts of improper use of reproductive technology are punishable with up to three years' imprisonment or a fine, namely:
Transferring to a woman an unfertilized egg cell produced by another woman (subsection 1, no. 1)
The attempt to artificially inseminate an egg cell for any purpose other than achieving pregnancy in the woman from whom the egg cell originated (subsection 1, no. 2)
The attempt to transfer within one treatment cycle more than three embryos to a woman (subsection 1, no. 3)
The attempt to fertilize by gamete intrafallopian transfer more than three egg cells within one treatment cycle (subsection 1, no. 4)
The attempt to fertilize more egg cells from a woman than may be transferred to her within one treatment cycle (subsection 1, no. 5)
The removal of an embryo from a woman before completion of implantation in the uterus in order to transfer it to another woman or to use it for another purpose not serving its preservation (subsection 1, no. 6)
The attempt to carry out the artificial insemination of a woman who is prepared to give up her child permanently after birth (surrogate mother) or to transfer a human embryo to her (subsection 1, no. 7)
The artificial penetration of a human egg cell by a human sperm cell or the transfer of a human sperm cell into a human egg cell artificially without the intention to achieve pregnancy in a woman from whom the egg cell originated (subsection 2)
https://biopolicywiki.org/index.php?title=Germany