Progesterone
Levels During Pregnancy
What
is progesterone?
Progesterone
is a hormone produced by the ovaries that helps prepare the
uterus for pregnancy. It is first produced by the corpus
luteum in the ovaries and later is maintained
by the placenta.
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What
does progesterone do?
- Helps
to regulate the menstrual cycle.
- Prepares
the lining of the uterus for implantation.
- Keeps
the lining of the uterus thick which is necessary for
a successful pregnancy.
- Produces
a rise in temperature after ovulation, which remains until
menstruation occurs.
- Creates
a nutrient rich environment for the baby by increasing
glycogen and arterial blood to the lining of the uterus.
- Keeps
the uterus from having contractions.
- Causes
the cervix to thicken and create a mucous plug which prevents
bacteria from entering the uterus.
What
are normal progesterone levels?
|
Progesterone
during menstrual cycle |
| Day
1-14 |
>1
to 1.5 ng/ml |
| Day
15-28 |
2-28
ng/ml |
|
Progesterone
during pregnancy |
| First
Trimester |
9-47
ng/ml |
| Second
Trimester |
17-147
ng/ml |
| Third
Trimester |
55-200
ng/ml |
Sometimes
doctors will check a woman's progesterone level during pregnancy.
Most doctors like to see a minimum level of 10 ng/ml during
the first few weeks of pregnancy. If a woman has
low progesterone levels this can be an indication of a threatened
miscarriage.
If you are concerned about your progesterone level talk to
your doctor for more information.
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