Stelara and Tremfya Pregnancy Exposure Registry OTIS Autoimmune Diseases in Pregnancy Project

This is a pregnancy registry study — not a treatment trial — that tracks the health outcomes of babies born to mothers who took the medications Stelara (ustekinumab) or Tremfya (guselkumab) during pregnancy. These medications are biological treatments used for conditions like psoriasis and inflammatory bowel disease. The registry helps researchers understand whether these drugs are safe to use during pregnancy. **You may be eligible if...** - You are pregnant or have recently completed a pregnancy - You were exposed to Stelara (ustekinumab) or Tremfya (guselkumab) at any point during your pregnancy, or within 3 months before your last menstrual period - The timing of your medication exposure during the pregnancy can be documented **You may NOT be eligible if...** - You did not take Stelara or Tremfya at any point during the relevant time period before or during your pregnancy Talk to your doctor to see if this trial is right for you.