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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Irregular Periods Inspite Of Susten Intake?

Hi doctor...I am pcos patient with irregular periods. My gyn advised me to take susten 300 for 3 days(one tab per day) after missing period then i would get period within 5-7 days. My lmp was 18-3-15 and i took susten on 20-22 of april. It s about 8 days but still no period...is ther a chance of pregnancy...?
Fri, 24 Feb 2023
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General & Family Physician,  's  Response
Hi,

The withdrawal bleeding after withdrawal of progesterone (susten 300), will cause an abrupt low level of progesterone, resulting in withdrawal bleeding within 5-7 days, but it may be also up to 10 days. Therefore, you are advised to wait for 2 days more. Usually, if you are not pregnant, then there should be withdrawal bleeding within 10 days of last dose of Susten 300.

If there is no bleeding within 10 days, then there are chances of your being pregnant. Still, about 5-10% of cases do not have withdrawal bleeding, though they are not pregnant. Therefore in such cases an HPT is mandatory to confirm or rule out a pregnancy.

Take care. Hope I have answered your question. Let me know if I can assist you further.

Regards,
Dr. Satnarain Bansal, General & Family Physician
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What Causes Irregular Periods Inspite Of Susten Intake?

Hi, The withdrawal bleeding after withdrawal of progesterone (susten 300), will cause an abrupt low level of progesterone, resulting in withdrawal bleeding within 5-7 days, but it may be also up to 10 days. Therefore, you are advised to wait for 2 days more. Usually, if you are not pregnant, then there should be withdrawal bleeding within 10 days of last dose of Susten 300. If there is no bleeding within 10 days, then there are chances of your being pregnant. Still, about 5-10% of cases do not have withdrawal bleeding, though they are not pregnant. Therefore in such cases an HPT is mandatory to confirm or rule out a pregnancy. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Satnarain Bansal, General & Family Physician