Listen now 30 mins
Kati Whitaker talks to people in the UK and the USA about the ways in which children conceived through a sperm donor can make contact, and forge a familial bond, with their potential half-brothers and sisters.
She hears about the difficult choices that both parents and children have to make, and how for some there is the reward of discovery of a half-sibling, but for others the search proves to be a journey into the unknown.
A Ladbroke Radio production for BBC Radio 4.
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