Riccardo Magi, an opposition MP in favour of the Europe-wide certificate, complained: "The world goes one way, the [Italian] government goes the other."
The debate is being followed closely from the north-eastern city of Udine by Stefano Zucchini and his husband Alberto.
They have two six-year-old twins, who were born in California through surrogacy, and hope to be legally recognised as a family one day. In the US, they are both recognised as parents. But in Italy, Stefano is listed as a single father, and that legal status makes life complicated.
"Even things that are normal for most people, such as driving the kids to the kindergarten or to a doctor appointment, can become a challenge," he told the BBC.เว็บคาสิโน