Final answer:
Pregnancy can have different effects on myasthenia gravis, with some women experiencing an improvement or remission of symptoms, while others may have worsened symptoms. Additionally, a small percentage of babies born to mothers with myasthenia gravis may develop transient neonatal myasthenia gravis.
Step-by-step explanation:
Pregnancy can have various effects on the course of myasthenia gravis. While it is not always predictable, some studies have shown that pregnancy can lead to a temporary improvement or remission of symptoms in about 30-50% of women with myasthenia gravis. On the other hand, about 10-20% of women may experience a worsening of symptoms during pregnancy. In rare cases, approximately 10% of babies born to mothers with myasthenia gravis may develop transient neonatal myasthenia gravis, which is a temporary condition that can cause muscle weakness and other symptoms in the newborn.