I know these are scientists and a 'Human embryo model' is a perfectly valid name, because it's a model of a human embryo, but it's a disaster from a marketing perspective. People will see 'human embryo' and it doesn't matter that it's just a model of one. You are now growing fetus-slaves.

Please call it something else.

Edit: they are calling it 'hematoids' and make it clear that it is quite different from an embryo. I'm not sure why it's compared to them in the first place then.