My colleagues 12 year old daughter wants the vaccine but ' a doctor' said that it could cause fertility problems so she is hesitant to have it because she wants kids when she gets older, thing is it may be true.
What may be true? Do you mean it may be true that the vaccine could cause fertility problems? I don't think any UK doctor would or should be saying that. There is absolutely nothing to suggest that at all, any more than with any other vaccine.
There is no evidence to suggest that COVID-19 vaccines will affect fertility and the ability to have children.
16 Aug 2021
COVID-19 vaccines: updates for August 2021
https://www.gov.uk › drug-safety-update › covid-19-vacc...Also:
Why COVID Vaccines are Falsely Linked to Infertility