I don't know much about progesterone, but my #2 beta didn't double perfectly in 48 hours. I think it was more like 56 hours. My 3rd beta really shot up and here I am 5 weeks from my little guy! Good luck!
My RE just wanted to see an increase of 60% and said it can take anywhere from 48-72 hours to double. You are still within that timeframe...sounds good to me!!
That is still in the 72 hour doubling range. No worries just yet! Besides....on my first pregnancy my beta TRIPLED in 48 hours over and over and over again and I still m/ced on my second pregnancy it doubled in 48 but barley and well...she is 8 months old!
"I have four children. Two are adopted. I forget which two.
-Bob Constantine
"All for Love,' a Saviour prayed 'Abba Father have Your way. Though they know not what they do...Let the Cross draw men to You...."
You are good. As long as it is under 72 hours you are fine. As for the progesterone, 15 is ok. They don't get concerned until it is under 10 but over 20 is the best. Just make sure they keep an eye on it at your next beta in case you need a supplement.
Re: Was your HCG doubling time more than 48 hours?
"I have four children. Two are adopted. I forget which two. -Bob Constantine
"All for Love,' a Saviour prayed 'Abba Father have Your way. Though they know not what they do...Let the Cross draw men to You...."