As a parent, where can I find resources about how to start the conversation with my child about menstruation?

Ask them whether they have heard about puberty and find out what they know so far. Correct any wrong information. Sharing your own experiences about when you started your period, whether it's long or short, heavy or light, will help them feel more comfortable. Invite them to ask any questions they may have and answer them clearly. Direct them to reliable books or websites (like August's!) if they feel more comfortable reading about it than talking about it.