Children meet their donor mother
Most men and women who donate their sperm or eggs to enable someone else to have the chance to have a child do not know who they are giving to and have no contact with the family they have helped.
Joan Isherwood from Warrington, Cheshire, had twins as a result of a donation by Sylvia Bass and they decided to meet. Mrs Isherwood's son, Jonathan, told BBC Breakfast that it was "amazing" to meet his donor mother.
Clip courtesy of Donor Mum: The Children I've Never Met, BBC One, 30 August, 2235 (BST).