What are the differences between IVF and IUI, the fertility treatment used by Tim Walz's family?

Around 1.7% of women ages 15 to 49 years old have tried a procedure called artificial or intrauterine insemination to start a family, the most recent data from the Centers for Disease Control and Prevention suggests.

Among them was the wife of Minnesota Governor Tim Walz, the running mate of Vice President Kamala Harris, as part of what she describes as an "incredibly personal and difficult experience."

"The only person who knew in detail what we were going through was our next door neighbor. She was a nurse and helped me with the shots I needed as part of the IUI process," said Gwen Walz in a statement shared by a campaign spokesperson.