Conception with a known donor can provide a more personal dimension to your family building arrangement, however, it can also create risks in practice because the parties are known to each other. Changes of heart, disagreements and changes of circumstances can have an impact on your overall legal position, particularly after the birth if the donor has established a relationship with the child. To protect yourself against these risks, you should seriously consider entering into a carefully written known donor agreement. If you do, the English Family Court can take this into account if a dispute arises. Whilst the courts paramount consideration is the welfare of the child, your known donor agreement can be important evidence, clearly illustrating what was intended, understood, and agreed between you and your donor.