16. Is donation of sperm, oocytes and embryos anonymous?
No
17. Is it possible to obtain information about the biological origin of a child born after gametes or embryo donation? For the child? For the parents? For a court?
Yes
In particular: identity of the donors for the child, for the parents, for a court?
Yes
Certain health information concerning the donor(s), for the child, for the parents, for a court?
Yes, details in § 20 Law on Medical Assisted Procreation “Fortpflanzungsmedizingesetz”.
18. Is it possible to contest maternity and paternity of children born utilising MAP and under which conditions (family law provisions)?
Yes, under Austrian law, the mother is the woman who gave birth to the child. The father is the husband of the mother, or the man who recognized paternity or whose fatherhood was imposed by the court. The donor of sperm/eggs is excluded by law from fatherhood/motherhood.
Regulations see § 144 and §145 Austrian Civil Code “Allgemeines Bürgerliches Gesetzbuch”