A recent BBC investigation captured international attention and sparked important conversations throughout the fertility community. The story centered on a sperm donor in Europe who unknowingly carried a rare genetic mutation associated with Li-Fraumeni syndrome. This...
Worldwide Family Limit Program
More transparency. More information. More choice.
Beginning in 2027, Seattle Sperm Bank is expanding our existing Family Slot Program into a worldwide framework. Every donor will be assigned a defined worldwide family limit of 75, 25, or 10 families.
The program is designed to give intended parents clearer information about donor family access and another meaningful factor to consider when choosing a donor.
If you have any questions at any time, please feel free to contact us at cs@seattlespermbank.com.
What's Changing in 2027?
This expansion of a worldwide family limits program builds on Seattle Sperm Bank’s already existing Family Slot Program, into a defined worldwide framework for every donor.
Every Donor
Beginning in 2027, every Seattle Sperm Bank donor will be assigned a defined worldwide family-limit tier.
75 | 25 | 10
Each donor will have a worldwide family limit of 75, 25, or 10 families.
Worldwide Access
The program provides intended parents with clear information about the number of families who may have access to a specific donor worldwide.
Family Slots
Seattle Sperm Bank was the first sperm bank in the United States to introduce family slots for newly available donors.
A family slot allows the tracking of the number of families utilizing a donor at any given time. Owning a slot allows families to have access to available vials for their donor of choice while going through current and future treatments.
How the Program Works

Donor is Assigned a Tier
Every donor is assigned a worldwide family limit of 75, 25, or 10 families.

Family Purchases a Slot
A family slot provides access to purchase that donor's available vials.

Family Uses Available Vials
A family may purchase multiple available vials and may use those vials to have multiple children.

Family Limit is Reached
Once the donor reaches his worldwide family limit, no new family slots are available for purchase.
Worldwide Family Limit Pricing
The cost of IUI vial + family slot is based on the donor’s assigned worldwide family-limit tier.
IUI Vial
Family Slot
Please note: Seattle Sperm Bank assigns each donor’s worldwide family-limit tier. Intended parents do not select the tier.
The family slot is purchased separately from the vial. A family slot provides access to purchase that donor’s available vials now and in the future, subject to inventory availability and the terms of the program.
Why Worldwide Family Limits?
Donor conception increasingly crosses geographic borders. A donor may be available to families in multiple countries, where regulations, reporting requirements, and approaches to donor family limits can vary.
We believe intended parents deserve meaningful information about donor family access as they make decisions about building their families.
The Worldwide Family Limit Program is designed to provide that information through a clear and consistent worldwide framework.
More Transparency
Clearer information about donor family access.
More Information
Another meaningful factor to consider when choosing a donor.
More Choice
The ability to make decisions based on your own family’s priorities.
Family Limit FAQs
Learn More About Donor Family Limits
The conversation around donor conception is changing. Explore our educational resources to learn more about donor family limits, global donor distribution, transparency, and the evolving donor-conception landscape.
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