what does progesterone do?
13 Replies
diem - August 1

I decided that since I have a leutal phase of 9 days that I would go see my doc about it. What does progesterone do to extend the leutal phase. Is it a pill or a shot that you get? How often do you get it? Does insurance cover it?

Sorry I have so many questions but this is new to me.


thayward7 - August 1

Progesterone can be given in a variety of ways... usually a vaginal suppository is given as this eliminates involving the liver. Once you release the egg, the follicle that the egg was in is suppose to release progesterone. This helps to raise the temperature and makes for a nice environment for your egg to implant. I will be getting tested for progesterone this cycle too, so I did a bit of research. Hope this helps. Oh, I asked how much it costs today, and in Canada (where I am) they are about 1 dollar per suppository and you usually use them twice a day. Take Care!
- T


MelissaV - August 2

Here is some info I found about progesterone:
Progesterone, not to be confused with progestin, performs many functions in the body. It is produced by the ovaries and the adrenal glands in women and, in much smaller amounts, in the testes and adrenal glands in men.

One of progesterone's primary roles is to help make the uterus ready for implantation of a new embryo, and to help maintain the lining of the uterus during pregnancy. If pregnancy does not occur, progesterone production temporarily ceases, and this signals the uterus to shed its lining.

Some of the many other functions performed by progesterone include:

Natural Diuretic
Decreases risk of Endometrial Cancer
Enhances mood and has a calming effect, acting as a Natural Anti-Depressant
Aids Thyroid Hormone Action
Normalizes Blood Sugar Levels
Restores Libido
Promotes Bone Building and helps Prevent Osteoporosis
Protects against Fibrocystic Breasts


MelissaV - August 2

Like the above post said, it can come in several forms. I take a pill called prometrium on cycle days 16-28. I 200 mg once a day on those days. My insurance does cover it, but since there isn't a generic it costs me $20 a month.


MollieJo - August 2

diem, I think my leutal phase is only 9 days too. I got a pos OPK on CD16 then AF on CD25. I am going to call my doctor and see if I cam get a progestrone level drawn. I heard of some women that bought progestrone cream at the drugstore and used that but I am afraid to try it without my doctor telling me it is ok. I am afraid that I will take the clomid then get the progestrone drawn and find out it is too low. By then I think the whole cycle is wasted!!!


thayward7 - August 2

Be careful about progesterone creams from the drug store. I have read that they are very inconsistent in the amount of progesterone that is in them. I would definitely ask your doctor first! Smiles!
- T


MollieJo - August 2

That's what I'm afraid of. I am waiting for my doctor to call back.


MollieJo - August 2

My doctor is going to have my blood drawn on CD21 to check my progestrone level. I asked the nurse if there was anything I could do for this cycle if it is low and she said no. So there is a chance that this cycle is wasted. On the bright side maybe I'll figure out if that's what's wrong and it seems easy to fix.


thayward7 - August 2

I hope it all works out for you! Take Care, - T


kristie h - August 3

Hi Girls, i am sorry to jump in like this but if i have a endometrial thickness of <2mm does that mean that i am lacking in progestrone? I am ttc and i found out the other day about this problem so what do you think my doctor will do?


isa - August 3

for Kristie, when my lining was thin doc gave me estrace estrogen to thicken it and in 2 days it worked. You need at leasta a 6.5mm lining to implant and preferably at least a 7.5mm. It may also have to do with progesterone, I'm just letting you know how he fixed mine since the clomid made it too thin we would have had to cancel the iui's but instead he just put me on the estrogen. (didnt get pg)


kristie h - August 3

Hi Isa, thank you so much for your info, i will write that down on a peice of paper and when i see my doc again 10 days i will ask about it, thanks heaps for you help!!!!!


diem - August 3

Thank you to everyone who responded. I really feel like I have a better understanding at this point.



SANN - August 6

Hi Diem, the follicle (that the egg was released from) goes to form the corpus luteum which produces progesterone. After fertilization then the levels of progesterone will increase and the uterus lining continues to thickens for implantation. Estrogen helps to prepare the uterus lining. According to my on/gynae, if she puts me any ov induction med, she'll also put me on estrogen supportories to enhance progesterone production and be u/s monitor the follicles. Once the copus luteum is formed she'll put me on progesterone supportories. Good luck. Keep us posted : )



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