Families formed through donor conception — whether via a licensed UK clinic, a known donor arrangement, or international surrogacy — come in more shapes than the law has always kept pace with. Two mums, two dads, single parents by choice, known donors who stay involved, co-parenting partnerships between friends: all of these are donor-conceived families, and all of them need tools that reflect their reality.
This guide covers the UK legal framework (HFEA, parental orders), the different family structures that exist, how to talk to children about donor conception, and how Larkling's 🐦 custom roles and inclusive design support donor-conceived families.
UK Law: Who Is the Legal Parent?
The Human Fertilisation and Embryology Act 2008 (HFEA) is the primary legislation governing donor conception in the UK. It determines legal parenthood based on the circumstances at the time of conception, not genetics.
| Scenario | Legal Mother | Second Legal Parent | Donor Status |
|---|---|---|---|
| Heterosexual couple, licensed clinic | Birth mother | Husband/partner (if consented) | Not a legal parent |
| Same-sex female couple, licensed clinic | Birth mother | Spouse/civil partner (if consented) | Not a legal parent |
| Single woman, licensed clinic | Birth mother | None (no second parent) | Not a legal parent |
| Surrogacy (UK, licensed) | Surrogate (birth mother) | Surrogate's spouse | Intended parents apply for parental order |
| Known donor (informal, at home) | Birth mother | None or mother's partner | May be legal father — risky, needs legal advice |
Parental Orders: What They Are and When You Need One
A parental order is a court order that reassigns legal parenthood from the surrogate (and her spouse, if applicable) to the intended parents. It is the primary legal mechanism for intended parents in surrogacy arrangements under UK law.
Key requirements:
- Application window: Within 6 months of the child's birth.
- Genetic link: At least one intended parent must be genetically related to the child (using their own egg or sperm).
- Surrogate consent: The surrogate must freely consent (no earlier than 6 weeks after birth).
- Conception: Must have occurred through artificial insemination or IVF (not sexual intercourse).
- Residence: At least one intended parent must be domiciled in the UK.
The Law Commission has recommended reforms to modernise surrogacy law, including a proposed "new pathway" that would grant intended parents legal parenthood from birth (removing the need for parental orders). As of 2026, these reforms are under consideration but not yet enacted.
Donor-Conceived Family Structures
Donor-conceived families are diverse. Common structures include:
👩👩👧 Two-Mum Families
One mother carries the child using donor sperm. Both mothers can be legal parents if they are married/civil partners and conceived via a licensed clinic. The non-birth mother is the second legal parent. Children have two legal parents, both female.
👨👨👦 Two-Dad Families (via Surrogacy)
Typically, one father's sperm is used with a donor egg and a surrogate carries the child. The intended fathers apply for a parental order. Until the order is granted, the surrogate is the legal mother. Both fathers become legal parents after the parental order.
👤 Single Parent by Choice
A single woman or man uses donor gametes (and surrogacy, for single men) to become a parent. Single women who conceive via a licensed clinic are the sole legal parent. Single men typically require surrogacy and a parental order.
🤝 Co-Parenting Partnerships
Two (or more) people — often friends, not romantic partners — agree to conceive and raise a child together. These arrangements can involve known donors who remain involved. Legal parenthood depends on whether conception occurred through a clinic. Without clinic involvement, legal clarity is difficult to establish.
Talking to Children About Donor Conception
Research consistently shows that early, honest, age-appropriate disclosure is far better for donor-conceived children than secrecy. The Donor Conception Network, a UK charity, recommends starting the conversation in toddlerhood so the child grows up always knowing their origin story.
Age-appropriate approaches:
- Ages 2–4: "We needed help from a kind person to make you. That's how our family was made." Use children's books like Our Story (Donor Conception Network).
- Ages 5–8: Introduce basic biology concepts. Explain that some families use donor eggs, sperm, or embryos. Answer questions simply and honestly.
- Ages 9–12: Children may start asking about the donor's identity. Be prepared for curiosity and emotion. The HFEA Register allows donor-conceived people to access identifying information at age 18 (16 for non-identifying info).
- Teens: Support their interest in contacting the donor or donor siblings (e.g., through the Donor Sibling Registry). Respect their autonomy.
If you have a known donor who is involved in the child's life, their role should be discussed similarly — with clarity about their relationship to the child and what to call them.
How Co-Parenting Apps Support Donor-Conceived Families
Donor-conceived families often have more than two adults involved in a child's life: birth parents, non-birth parents, known donors, surrogates, and extended family. Traditional co-parenting apps that limit users to "Mother" and "Father" simply don't fit.
Larkling 🐦 was built for this reality:
- Custom roles: Define caregivers however your family does — "Mum," "Mama," "Dad," "Papa," "Donor," "Birth Mother," "Surrogate," "Guardian." Roles are what you name them.
- Custom pronouns: Every caregiver can set their own pronouns (she/her, he/him, they/them, or custom).
- No limit on caregivers: Include everyone who needs to be in the loop — two mums, a known donor, grandparents — without artificial caps.
- Non-editable messaging: Creates a reliable record of agreements, schedules, and communication — helpful for any future legal questions about the donor arrangement.
- Shared calendar: Coordinate multiple caregivers' schedules, contact visits with known donors, and parenting time across non-traditional family structures.
- Expense tracking: Manage financial contributions from multiple adults — fertility treatment costs, child expenses, donor-related expenses.
Known Donors: Agreements, Boundaries, and Documentation
If you have a known donor arrangement, clarity is everything. Even if everyone gets along, documenting your agreements prevents misunderstandings. Key areas to cover:
- Contact frequency: How often will the donor see the child? Holidays? Birthdays?
- Role definition: Is the donor "Uncle Tom," "Donor," "Biological Father," or something else? What do they tell the child?
- Decision-making: Do the legal parents make all decisions, or does the donor have input on education, health, religion?
- Financial contributions: Is the donor contributing financially? If so, how much and for what?
- Future changes: What happens if the donor wants more or less involvement? What if the legal parents want to change the arrangement?
While informal agreements aren't legally binding in the same way a parental order is, having them in writing — and keeping all communication in Larkling's non-editable messaging — creates a clear record of what was agreed. This can be helpful if disputes arise later.
The HFEA Register and Your Child's Rights
Children conceived through UK licensed clinics using donor gametes after 1 April 2005 have the right to access identifying information about their donor when they turn 18. At 16, they can access non-identifying information (physical description, ethnicity, year of birth). The HFEA Register holds this information.
If you used a known donor through a clinic, their details are on the Register. If you used an unlicensed arrangement, your child will not have access to this information through the HFEA — another reason to carefully consider the legal route you take.
The Donor Conception Network and Other Resources
You are not alone. UK organisations supporting donor-conceived families include:
- Donor Conception Network (DCN): Charity offering resources, workshops, and peer support for parents and donor-conceived people.
- HFEA: The fertility regulator. Their website explains legal parenthood and provides clinic ratings.
- Donor Sibling Registry: International platform connecting donor-conceived people with their donor siblings.
- National Gamete Donation Trust: Information and support for donors, recipients, and donor-conceived people.
Your Family, Your Roles, Your App 🐦
Larkling supports donor-conceived families with custom roles, custom pronouns, unlimited caregivers, non-editable messaging, and shared tools — all free forever. No "Mother/Father" assumptions. Just the family you've built.
Get Larkling FreeFrequently Asked Questions
What is a donor-conceived family?
A family where a child was conceived using donated eggs, sperm, or embryos, including same-sex couples, single parents, and co-parenting arrangements.
Who are the legal parents under UK law?
The birth mother is always the legal mother. Her spouse/civil partner is the second legal parent if they consented. Known donors through clinics are not legal parents.
What is a parental order?
A UK court order transferring legal parenthood from surrogate to intended parents in surrogacy cases. Must be applied for within 6 months of birth.
When should I tell my child they are donor-conceived?
From toddlerhood, in age-appropriate language. Early disclosure is consistently recommended by experts and donor-conceived adults.
Can Larkling accommodate known donors?
Yes. Custom roles let you include known donors with specific access levels (calendar only, messaging, etc.) appropriate to your arrangement.
Further reading: LGBTQ+ Co-Parenting Guide | Polyamorous Family Guide | Blended Family Guide | Single Parent Guide | Larkling Blog