Actually, the rules are somewhat ambiguous in that respect. It would be expected that they could use this method, since, together with Law 25/2016, the application of assisted reproduction techniques to single women and lesbian couples was also approved. However, single women are not mentioned in the surrogacy law and the couple (or spouses) is always mentioned, which seems to exclude them.
If the philosophy of these changes is to extend the rights of the different family models, what is the point of not allowing access to surrogacy but to other methods of medically assisted reproduction?
Suggested for you: Surrogacy in Portugal: Law and Conditions for Foreigners.