Doctrine 2: How to search for an entity by its association's value?

Let's say I have an Account entity, and an AccountData entity (which stores some less used properties, like gender, etc).

The relationship between Account and AccountData is one-to-one, and the Account "owns" AccountData.

I'm trying to figure out, using Doctrine 2 / Symfony 2, how to pull up an Account according to a property in AccountData.

For example, how do I search for all Accounts with AccountData->gender = 'female'?