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Re: Progesterone in pregnancy

Re: Progesterone in pregnancy

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Posted by Angie on July 24, 2000 at 23:17:33:

In Reply to: Progesterone in pregnancy posted by Jo on July 24, 2000 at 22:59:49:

: Hi all,
: : I am in early pregnancy (about 4 weeks) I had thyroid problems and a miscarriage on my last pregnancy in October. Today they took my usual tests(thyroid panel and quantitative beta sub) , but also added a new one: progesterone level. Does anyone know what kind of numbers I should be looking for on that one? I heard over 20 is good but would appreciate any info I can collect. Thanks! Jo
: P.S. Anyone take PTU while pregnant? How did that go?

I don't know if this will help, I copied it from a site I found. My daughter is 5 month along and we had just read about this. Good luck with the pregnancy!

Progesterone is largely produced by the corpus luteum (the
ruptured spot on the ovary where the egg erupted) until about 10
weeks of gestation. A woman needs approximately 10 ng/mL of
circulating progesterone per day to maintain the pregnancy. But
pregnancies survive with much lower and much higher levels, so
the predictive value of progesterone levels is limited.

The placenta takes over the progesterone production after 10
weeks, and levels gradually increase to about 100 to 200 ng/mL
by term. The placenta produces about 250 ng per day.
Production of progesterone is independent of fetal well-being, or
even the presence of a fetus. This is because the fetus
contributes essentially no precursor to progesterone formation.
The majority of placental progesterone is derived from maternal

So a high level would not mean multiple pregnancy. It could
perhaps mean that you are farther along than you suspect.
Higher-than-expected hCG levels would indicate twins, as would
higher AFP values.

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