Julia always knew her mums used a sperm donor. She didn’t know that meant she had 19 siblings – until now.

Follow her remarkable journey to discover her "very extended family".

Produced by the BBC's Hannah Long-Higgins and Ben Davis.

Filming and editing Hannah Long-Higgins; additional editing Nick Watson and Vara Szajkowski; audio Ben Davis; graphics Simon Martin.

Watch the full TV documentary this weekend on BBC World Newsand listen to it here on BBC World Service radio.

Viewers in the UK can see the programme on the BBC News Channel on Wednesday 28 August at 03:30 GMT. It will also be available on iPlayer.