birth control
"The first 3 months I had a period every 14 days.  They lasted about 5 days, slightly heavier bleeding than normal for me.  Then after the 3rd month, my periods went back to their normal 28 day off, 6 day periods.    I'm breastfeeding my 7 month old, so this is a great option.  No weight gain, no mood swings, no soreness or anything negative."