my last period is on October29 .this month I...

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Regarding your question,

Treatment of absent menses

Based on what you mentioned i see the following

• The commonest cause of absent menses is pregnancy.
• You did pregnancy test and it does not confirm or exclude pregnancy.
• It is better to do pregnancy test via blood test to confirm or exclude pregnancy.
• It the blood test result more than 25 this indicate or confirm pregnancy.
• If your pregnancy test negative, you can wait for 7 days after your expected date of menses

Causes of absent menses

There are many causes like

• Pregnancy
• Stress and depression
• Infections
• Uterine causes like adhesions
• Ovarian causes
• Drugs side effects
• Others

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Kind Regards