Discuss with partner
If you are in a relationship.
There are benefits and risks either way. Will the friend want to, or will you want him to be involved with the future child's care and/or wellbeing. Is or will the friend be in a relationship which might have some bearing on the situation, i.e. Being upset?. Advantage of friend is u know his medical background, personality traits +s &-s. Then u & ?Partner must decide.