A shorter menstrual cycle can cause you to have two periods in one month.
It is not usually a cause for concern and will often stop after a few weeks or months 7.
Up to 1 in 5 people experience breakthrough bleeding when first taking the pill 6.
Which methods raise, lower risk.
The Jazz Bra Sizing Chart.
How is Endometriosis Treated?
Many women have irregular periods occasionally; others have them throughout their lives.
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For example, some research suggests that people who switch between day and night shifts, like nurses, often experience irregular periods.