Stephen Blood will be acknowledged on his sons' birth certificates
Diane Blood has finally won a campaign to have her late husband legally recognised as the father of her two children.
Mrs Blood, from Worksop in Nottinghamshire, went to Westminster on Thursday to see the new legislation approved by the House of Lords.
Stephen Blood died of meningitis in 1995, before the couple had a chance to start a family.
Mrs Blood campaigned to have sperm taken from her husband while he was in a coma.
The samples were then used to conceive her children.
Outside the House of Lords, Mrs Blood said:
"It's the right to tell the truth and it's also important to my children's paternal relations that they're acknowledged as the relations they are - my children have two sets of grandparents, not just one.
"It's taken an awful long time - I didn't know that to change legislation was so hard and that there were so many hurdles to jump over.
"This will mean that children conceived after their father's deaths - we think there are around 30 to 40 at the moment - can have their father's name on their birth certificates."
The law had stated such procedures needed both parents' written permission.
But in 1997, after a two year fight, the body which governs assisted conception gave Mrs Blood the go-ahead to seek the treatment in Belgium.
She gave birth to Liam in December 1998 and Joel was born in July 2002.
Mrs Blood launched her lengthy battle to get her husband's name on the birth certificate after having her first baby.
Finally in February this year Mrs Blood won High Court backing for the legal move, which the House of Lords followed up on Thursday.