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will mirena affect an HPT because of its progesterone?

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I am 23 and have been on Mirena since November/December of last year. I checked my strings about a month ago and could feel them but now I can't. Well, about a week ago I started experiencing some pregnancy symptoms. Nausea, fatigue, body aches, throwing up certain foods, and aversion to most of my favorite foods and they have been constant. I took a HPT test a week ago, it came out negative but its only been six weeks. Im wondering if a blood test should be more accurate or if the mirena would affect an HPT because of its progesterone based levels. Keep in mind, I havent had my period in three years because I got off Depo-Provera about a year and a half ago. But during that stint without birth control, I did get pregnant and miscarry. Im just kind of worried that I am and it would happen again...

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replied August 29th, 2011
Birth Control Answer A26378
Welcome to ehealthforum,
The symptoms that you describe could be suggestive of possibility of pregnancy (especially if you are unable to feel the strings of the IUD). You should consider visiting your doctor/gynecologist at the earliest for examination and further evaluation especially to look for the position or presence of the IUD. Go ahead with further examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately). Urine pregnancy test usually start showing positive results after about 20 days post-conception that roughly corresponds to about a week after your missed periods. Blood/serum HCG levels are accurate. Look out for development of any other new symptoms.
Take care.

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