What's better than nine months without a period to deal with? Another three or four after delivery.
Typically, women who breast-feed get a menstrual reprieve beyond the length of the pregnancy -- at least two or three months, for most. Women who breast-feed for a year (or two) can go even longer. It puts a delay on fertility, presumably nature's act of kindness to allow you to catch your breath between pregnancies.
Next: Have they told you it's good for your health?