Complex sentence: Among the many techniques and instruments he developed were Hegar's sign and Hegar's dilator, as well as Hegar's operation, an operation for repairing a ruptured perineum.
Split into simpler sentences: Among the many techniques and instruments he developed were Hegar's sign and Hegar's dilator. As well as Hegar's operation, an operation for repairing a ruptured perineum.