The Ace of Wands begins the explosion of energy which runs throughout the Suit of Wands. Here we see massive out-rushing power, high levels of force, the beginning of whatever the Will desires.
When this card appears in a reading it often signifies the beginning of new life - whether as in pregnancy, or to represent the beginning of a whole new phase in life. In order to confirm pregnancy, you need to look for other 'baby' cards like the Princess/Page of Cups, or the Ace or 3 of Cups.
When the card comes up to indicate a new phase in life, there will often be other cards surrounding it which indicate the area that will be most affected by the new force.
This is a good card for healing energies, indicating high levels of vitality and vigour. This effect is much strengthened if the Sun also appears in the reading. It also indicates a period in life where we can forge forward toward our goals, having sufficient stamina and enthusiasm to follow through effectively.
It's worth bearing in mind, though, that this is a very raw energy - potent and powerful, but somewhat reckless and headstrong. Make sure that you don't get carried away with new projects, rushing heedlessly into something you have not considered thoroughly enough.