Hello, and I hope I can help you today.
There is little medical evidence about the effects of hallucinogenic mushrooms on
pregnancy, as there are many different types and species used for this purpose. However, many people consume alcohol or other substances generally regarded as harmful for pregnancy before they realize they are pregnant.
The period of the development of the major organs on the fetus does not begin until at least the eighth week, so any exposure before that time in pregnancy really does not have a chance to expose the fetus at a time critical to its development.
So it is unlikely that this one exposure will have any significant effect on the fetus as long as you do not continue to use the mushrooms later in pregnancy.
To help ensure the best pregnancy outcome, I recommend you begin taking a prenatal vitamin daily and discontinue any further use of alcohol or any other drugs not prescribed to you by a doctor.
I hope I was able to answer your question adequately and that my advice was helpful.
Best wishes for the rest of the pregnancy,
Dr. Brown