My sister and her partner want to have two kids. My sister really wants the experience of pregnancy, but her partner isn't sure she does, so my sister is up first. We are discussing the possibility of my husband becoming their known donor.
Some potentially relevent (or not?) facts: DH and I have a 9 month old and would like to have one or two more children. Sister, partner, and I are all one race and my DH is a different race (DS of course is biracial). DH is adopted and does not know his medical history. Part of what appeals to him about known donation is the pleasure of helping my sister become a mother, and helping all of us to enjoy an enlarged extended family. Part is for our son and any future siblings to have more biological relatives who look somewhat like them and might have similar blood and tissue types if anyone ever needed that (DH and DS are healthy now). DH is a very hands-on, engaged father and will be an involved uncle no matter who provides sperm to my sister and/or her partner. My sister and I grew up as part of a "gang" of beloved cousins and hope our kids can have some of that experience.
I'm just wondering whether anyone has advice for us on what we should be thinking about and talking through as we make this decision. We are pretty clear on the legal issues; it's the more emotional stuff I'm wondering about.