The thing is the licensed dose for oral use is 200 mg x 12 days - but this is a one-size fits all approach and does not vary with the dose of oestrogen. Other things being equal it tends to work fairly well on average with a medium dose of oestrogen - is too much for a small dose and can be too little for a large dose. When taken orally a lot is lost to digestion (passes through) and the rest metabolised through the liver so the amount getting into your system can be unpredictable. When used vaginally (unlicensed in this country but regularly used this way in continental Europe) more is absorbed which is why Stellajane is fine on this dose.
I agree with what she says that 100 mg orally for 12 days may not be enough. When used on a continuous combined basis the dose is 100 mg x 25 days with 3 days off to allow for a bleed if there is one. However some women get irregular spotting this way.
So it partly depends on how much oestrogen you are taking whether you get a bleed or not - as well as the amount of prog.
You could also try vaginal use if you are concerned?
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Topic: 100mg Utrogestan how many days? (Read 2217 times)