To help ensure this increase translates into a more balanced Senedd, parties would also need to place women at the top of at least half of their constituency candidate lists.
Er mwyn helpu i sicrhau bod y cynnydd hwn yn arwain at Senedd sydd â chydbwysedd gwell, byddai angen i bleidiau hefyd osod menywod ar frig o leiaf hanner eu rhestrau ymgeiswyr etholaethol.