TTC why take progesterone after ovulation and not just right away?

I have low progesterone and have miscarried before so I had my doctor give me a progesterone prescription just in case that's the issue. She told me to just take it every day, however, she is not an obgyn (will be seeing an obgyn in a couple of weeks). I searched online and everyone is saying that they were told to take their progesterone right when they know that they've ovulated and if they don't get pregnant they stop taking it and then start again right after ovulation.

What's the reasoning behind just taking the progesterone after ovulation instead of daily?

BONUS QUESTION :)
If you're on progesterone because you are TTC then what is your prescription strength?

(I was given synthetic progesterone pills)

I was under the care of a fertility doctor when I used progesterone and he had me start taking it 4 dpo (I knew exactly when I ovulate because of the treatment I was doing). My dosage was 200mg twice a day via vaginal suppositories. I had my progesterone level checked a few hours before starting the progesterone to make sure that I ovulated that cycle. My instructions were to have a blood pregnancy test 14 dpo and to stop the progesterone if the test was negative. I became pregnant that cycle and continued to take the progesterone until I was 10 weeks pregnant because around that point the placenta takes over the role of making it (previously the ovaries were responsible for making progesterone) and low progesterone levels are no longer an issue.

Why do questioners keep choosing the best answer for a person who fails to answer their question. How does the help people who are looking for the same answer.
The Q was: What's the reasoning behind just taking the progesterone after ovulation instead of daily?
How was that answered above???? Report Abuse

If you're ttc you should not be on a synthetic progesterone (a progestin) , if I remember correctly it's a category X pregnancy drug which can cause birth defects. I took prometrium orally but I believe taking it vaginally is even more effective.

If you take it every day you won't ovulate. You want to take it after you ovulate to build up the uterine wall properly and also in early pregnancy to sustain a pregnancy if you have low progesterone.

Progesterone is the hormone that builds the lining of the uterus that a fertilized egg with implant into. It starts to build after the corpus luteum ruptures to release the egg during ovulation and continues to increase after the egg implants to support life. If the egg doesn't implant, then the progesterone level in the body drops, and signals the body to shed the lining starting menstruation.

If you take it everyday, the hormones in your body will be out of balance.

RE's (specialist who do fertility treatment) always prescribe it 2-3 days after transfering the eggs back into the women or 2-3 days after ovulation.
The reason for waiting 2-3 days after ovulation is so that the lining doesn't over build and interfer with implanting. The corpus actually takes 2 to 3 days before it starts pumping out progesterone. They want to minic what a women's body does naturally. I conceived twice using progesterone only I had the awful injections. Felt like a pin cushion by the 10th week of pregnancy.
You'll notice your periods are heavier while on it so it does work and it does make a difference in the lining just in the 11 days of being on it. And hormonal!!! It makes me moody and cry of stupid stuff.