Once upon a time, I worked with 5-6 clients per month, which was fun but very hard to maintain. To effectively support my clients, I currently work with 2-3 clients per month. Sometimes only 1 or 2.
Usually, my calendar fills up many months in advance so don't delay to secure my support as your doula. Occasionally, an opening becomes available and I can contract with a "last minute" client - just ask me!