Based on the fact that Portugal is the country with the lowest fertility in Europe, we want to understand if the changes registered in the last decades in Portugal in terms of migrations and family contexts can also be felt at the level of fertility. More specifically, we want to answer questions such as:

• Do foreign women residing in Portugal differ from the Portuguese for the Synthetic Fertility Index?

• Are Portuguese and foreign women similar or different in aspects such as the age at birth of the first child, the number of children performed, expected and desired, or even the reasons for having children or not?

• And will foreign women be similar to each other, or, on the contrary, should the origin of these women be taken into account, since cultural factors may be important for decisions about fertility?

This seems to us one of the ways to understand and be able to act on the demographic changes.