Dear Mr./Ms. Bossname,
I had every intention of working through my pregnancy. What I didn’t expect was that I’d end up carrying high-order multiples. Due to this unplanned blessing, I must resign from my position, effective immediately.
After today’s checkup with my obstetrician, I learned of several risk factors and complications impacting my pregnancy. It is no longer possible or safe for me to perform several key aspects of my role at XYZ Company, including loading/unloading, counter work, and stocking.
I will be in touch with HR regarding details. Thank you for your support.