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I cant remember when my last period was, now what?

Hi all, me and my husband finally decided to start tracking my cycle today. But I realized I can't remember exactly when my last period was! Now what should I do to start my tracking habit correctly? Can I just wait for the next one or is there any way to estimate my fertile window for this month? ~ Omana Kuruba, 30 Yrs

Do not panic! Do your best to estimate, and your doctor will use an early ultrasound to date your pregnancy accurately. Some women track ovulation or conception dates instead. Tracking your body’s natural signals like discharge changes can help you pinpoint your fertile window for this month, allowing you to start your new tracking habit with confidence even without a fixed starting date.

Medically Reviewed Content
Medically Reviewed
By Ferty9 Medical Board, at Ferty9 Fertility Center | Last Reviewed: Apr 5, 2026
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