Quoting *PeanutButter*:" That's weird Did they know you were on your period when they told you to start taking it? Usually they have to take it on days 5-9 unless you haven't had your period het"
They gave it to me mid cycle last month and told me to wait until CD 3 to take it. They said CD 3 would give me more eggs, while doing it CD 5 would give me better quality eggs. Since I am young (27) they said egg quality isn't an issue.