Can a 33-year-old woman with NMOSD safely plan a pregnancy?

Hello,

Welcome to icliniq.com.

I have gone through your query and understand your concern.

I can imagine how difficult and emotionally complex this situation must feel, balancing your health with your wish to start a family. Neuromyelitis optica spectrum disorder (NMOSD) is a challenging condition, and it is understandable to worry about how pregnancy and fertility treatments might affect it. The reassuring news is that with careful planning and close coordination between your neurologist, fertility specialist, and a maternal–fetal medicine (high-risk obstetric) team, many women with NMOSD have successfully conceived and delivered healthy babies.

Rituximab is highly effective for reducing relapses, but it does have implications for pregnancy. Because it crosses the placenta, it is generally recommended to avoid conception for about 6 to 12 months after the last infusion, depending on your neurologist's guidance and antibody levels. This allows your immune system and B-cell levels to recover somewhat before pregnancy, reducing potential risks to the developing fetus.

However, it is essential to balance this with the risk of relapse, since stopping Rituximab for too long can increase that risk. Your neurologist may consider timing conception during a stable period when disease activity is low and the most recent MRI (magnetic resonance imaging) shows no new lesions, as is the case for you.

Regarding your menstrual irregularities, lighter or missed periods can sometimes occur with long-term immunotherapy or general stress and illness. However, it is worth checking your hormone profile (FSH (follicle-stimulating hormone), LH (luteinizing hormone), estradiol, AMH (anti-mullerian hormone), prolactin, and thyroid function) to assess ovarian reserve and rule out other potential causes.

As for IVF (in vitro fertilization) and hormonal stimulation, data are limited, but most evidence suggests that fertility hormones themselves do not directly worsen NMOSD. The primary concern is stress and the possible need to hold immunotherapy, which could slightly raise the risk. Many neurologists work closely with reproductive endocrinologists to schedule IVF at a time of stable disease. They may provide steroid coverage or adjust the timing of rituximab to reduce the risk during the process.

Pregnancy in NMOSD (neuromyelitis optica spectrum disorder) can carry slightly higher risks than in the general population, particularly for relapse during or after pregnancy (especially postpartum), as well as a modestly higher chance of miscarriage or preterm birth in some studies. However, these risks can often be minimized with a tailored management plan, including close neurologic monitoring and possible use of safer immunosuppressive alternatives during pregnancy if needed (for example, Azathioprine in some instances). Vision issues during pregnancy usually occur only if there is a relapse of optic neuritis, not directly from the pregnancy itself.

The best approach now is to form a multidisciplinary team, ideally including your neurologist experienced in NMOSD (neuromyelitis optica spectrum disorder), a fertility specialist, and a maternal-fetal medicine doctor. Some large medical centers or academic hospitals have dedicated neuroimmunology and pregnancy programs that coordinate between neurology and reproductive medicine. They can guide you on the safest timing for conception, possible bridging therapy, and ongoing monitoring.

I hope I have answered your question.

Let me know if I can assist you further.

Thank you.