Discrimination is "treatment or consideration of, or making a distinction in favor of or against, a person or thing based on the group, class, or category to which that person or thing belongs rather than on individual merit: racial and religious intolerance and discrimination. "

By the definition above, every driver buying insurance is discriminated against, as we belong to groups who have points on their licence, groups who drive high mileage a year because of their jobs, groups who have 1year NCD, groups who have 10years NCD, groups who are under 25 - the list is endless and nobody complains about discrimination here, so there's NO reason why having children should be any different.