No, there is no clinical research that microdosing is dangerous during a pregnancy. This applies to both the mother and the baby.
The medical literature does however suggest that minimal damage could arise when using high doses. During a pregnancy you are vulnerable, so try to be careful with that. The choice to use of our magic truffles is completely yours. For example, we recommend that you talk about this with a doctor if you plan to do this.
Do you not drink alcohol during pregnancy and do you carefully think about other harmful foods? Then it is probably also wise to not use microdoses.