About 1 in 10 people with myasthenia gravis have thymus gland tumors called In rare instances, pregnancy brings on myasthenia gravis symptoms for the first time. If you already have this condition, symptoms may worsen during the first trimester or immediately after childbirth. In some cases, myasthenia gravis symptoms improve during pregnancy., Symptoms may change. It can be hard to diagnose MG because the symptoms may appear suddenly and then go away after rest. Or, someone may have normal muscle strength 1 day and not the next. Also, MG symptoms can be very different from 1 person to another. 1,4. Doctors score how severe MG symptoms are using 5 stages: 1. Eye muscle weakness only, Myasthenia gravis (MG) is an autoimmune disorder that affects how well your nerves and muscles communicate. The Most Common Symptoms of Myasthenia Gravis. Medically reviewed by Alana Biggers , Ocular Myasthenia Gravis Symptoms . Ocular myasthenia gravis is the most common form of the disease. Ocular means "eye," and this type of MG is characterized by eye-related symptoms. Ocular , Myasthenia gravis can often be observed in older age groups such as men and women that are 60 years old and above. However, it can affect younger ones in some cases as well. Here are 10 most common signs and symptoms of myasthenia gravis. 1. Ptosis. The most common symptom and probably the earliest sign that someone is suffering from myasthenia , Juvenile MG The most common form of myasthenia gravis in children is juvenile myasthenia gravis. As with adults, the symptoms can vary from one child to another. As with adults, the symptoms can .