Quote from: DriftingCrow on February 22, 2015, 07:25:22 AM
How?

Women who have been pregnant experience permanent changes in their body chemistry that also mean their blood is considered risky for transfusion, though it's still used for research purposes. (This is sometimes expanded to all women of childbearing age in order to be as safe as possible, which is why it's not necessarily listed on donation forms.) There is currently no knowledge on what this means for trans men who have been pregnant, because trans health is underresearched and extremely few trans men wish to get pregnant, but it's best to assume that trans men who have been pregnant should not donate blood, as it would force them to disclose.

Red cross says you may donate blood 6 weeks after giving birth. Having a child does not make a difference. You can even donate while on birth control.

Quote from: LordKAT on February 22, 2015, 05:28:03 PM
Red cross says you may donate blood 6 weeks after giving birth. Having a child does not make a difference. You can even donate while on birth control.

I didn't say women who have been pregnant can't donate blood. I said that their blood is considered unsafe to use in transfusions, so it's used for other reasons. As it would be impossible to legally disclose an FTM pregnancy and there's no knowledge of how T would interact with that, trans men who have been pregnant should not donate blood.

I think if that were true, we would have heard something about it by now. Supposedly hormones , gender, having a kid, make no difference.  If not for transfusion, why donate blood?