Canada’s Supreme Court will begin Wednesday a three-day hearing on whether to legalize same-sex “marriages” across the country.

Currently, marriage between persons of the same gender are recognized in five of Canada’s ten provinces and in one of its two territories.

Advocates from both sides of the issue said Tuesday that the judges will most likely rule in favor of same-sex “marriages,” reported Reuters.

"We certainly feel like underdogs in this issue," said Janet Epp-Buckingham of the Evangelical Fellowship of Canada. "We are concerned that there may not be balance across the court at this time."

Evangelical Fellowship of Canada said Tuesday that it believes the Parliament should decide on the issue instead of the Supreme Court. The Christian group fears legalizing same-sex “marriages” would infringe on a church’s right to reject sanctifying something it is opposed to.

Louie Arron of Egale Canada, the group arguing for the court to recognize marriage between two men or two women, said during a press conference Tuesday that the rights of the church to refuse to perform wedding ceremonies remain unchanged.

Buckingham said there was no guarantee of this and the clergy could face court penalties if they refused to sanctify same-sex “marriages.”

Joining Evangelical Fellowship of Canada will be conservative Focus on the Family Canada who will intervene at court.

"When we redefine marriage, we are telling Canadian society and we are telling our young people that gender doesn't matter, that in fact fatherhood doesn't matter, that motherhood doesn't matter," said Derek Rogusky of Focus on the Family Canada. "Study after study shows that gender does matter."

After hearing the case, the Supreme Court will take several months before delivering its decision.