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A member asked:

Tried for a baby during fertile window a week laterstarted spotting its been on and off ever since and my period was supposed to start today but didnt?

A doctor has provided 1 answer

Some thoughts...: Pregnancy is the most common cause of a missed period. If not pregnant, other causes of a late or missed period include: excessive weight loss or weight gain, increased exercising, emotional stress, having an illness, traveling, medicines (especially birth control pills), hormonal disorders, etc… A home urine pregnancy test is very accurate 3 weeks after sex, or 1 week after missing a period.

Answered 11/17/2016

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My period came 5 days early, sunday. Only lasted 2 days, light to none the 3rd day. I was sexually active in the beginning of my fertile window and once toward the end. Can a blood test taken on wednesday be a false negative? Cycle supposed to Friday?

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