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My period came 1 week late last month. When should it come this month? It has been like clockwork starting on the 5th of every month and ending on the 9th. Last month it didn't start till the 13th and ended on the 17th.

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Dr. Ew Moffitt
Obstetrics & Gynecology

In brief: There

There are many reasons why a woman's period would be off a little one month.
They could have had a particularly stressful month. They could have had an illness. They could also have been pregnant. One study showed that 50% of women who are at risk for pregnancy in a given month actually do get pregnant but have a miscarriage so early that it is perceived as a normal period or just a few days late. If a woman is not pregnant and has a longer cycle than normal, most of the time they will reset their cycle starting from that date. In other words, if your period normally starts around the 5th and it came on the 13th, then next month it will come around the 13th. Hope that helps!

In brief: There

There are many reasons why a woman's period would be off a little one month.
They could have had a particularly stressful month. They could have had an illness. They could also have been pregnant. One study showed that 50% of women who are at risk for pregnancy in a given month actually do get pregnant but have a miscarriage so early that it is perceived as a normal period or just a few days late. If a woman is not pregnant and has a longer cycle than normal, most of the time they will reset their cycle starting from that date. In other words, if your period normally starts around the 5th and it came on the 13th, then next month it will come around the 13th. Hope that helps!
Dr. Ew Moffitt
Dr. Ew Moffitt
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