Final answer:
Epidural analgesia is best given during the first stage of labor, when the cervix is dilating.
Step-by-step explanation:
Epidural analgesia, a method of pain relief during labor, is typically given during the first stage of labor. This is when the cervix thins and dilates to about 10 cm. By providing epidural analgesia during this stage, the woman can get relief from labor pain while still being able to actively participate in the birthing process.