Progesterone and Fertility

Fertility & Progesterone

Progesterone is recognized as a vital female hormone central to successful conception and a healthy pregnancy. The word "progesterone" is itself etymologically related to the Latin root gestare - meaning to bear or carry - suggesting the importance of this hormone in creating a fertile environment for conception and the continuing development of the embryo. (Many women report that FertilAid for Women has helped normalize their progesterone levels. Additionally, many women indicate that external adminstration of a natural progesterone cream such as FertileBalance can be beneficial.)

In short, progesterone is a female sex hormone that is secreted by the corpus luteum to prepare the endometrium for implantation of the fertilized egg. Following implantation off the egg, the developing placenta signals the body to produce progesterone and prevent rejection of the developing embryo or fetus. Without this continuuing progesterone production, the endometrium would shed and menstruation would ensue. Therefore, progesterone plays a significant role in reproduction. Thus, progesterone...

  • Helps create a fertile, warm environment in the womb and promotes the survival of the fertilized egg through healthy implantation.
  • Strengthens and maintains the secretory endometrium which sustains the embryo throughout pregnancy.
  • Prevents the premature shedding of the secretory endometrium (menstruation).

As progesterone forestalls the shedding of the endometrium (where embryo implantation occurs), low progesterone levels - or a significant drop in progesterone levels - during the first few weeks of pregnancy may correspond with miscarriage.

Here, progesterone plays a 'secretory’ role in the reproductive organs. It stimulates changes in the uterus and supports pregnancy by increasing blood vessel and tissue development in the endometrium.

Progesterone, Fertility, and Reproduction

During a woman's cycle, progesterone levels rise rapidly at ovulation to provide a fertile environment for the fertilized egg. Here, progesterone is also responsible for the increase in body temperature at ovulation that lasts through most of the luteal phase. Beginning with ovulation, the corpus luteum produces progesterone for several days (and the concomitant temperature increase is in most cases easily measurable through methods of BBT/fertility charting).

If fertilization and implantation take place, the placenta takes over the role signalling progesterone production and in further maintaining a supportive environment for embryonic and fetal development. If fertilization does not occur, progesterone levels fall dramatically (usually after 10-12 days) triggering the shedding of the secretory endometrium (menses).

Because progesterone is essential in preventing the shedding of the secretory endometrium, a significant drop in progesterone levels during the first 10 - 12 weeks of pregnancy may result in a miscarriage.

Addressing the Issue of Low Progesterone Levels

Low progesterone can be detected by a blood test after ovulation or by charting fertility. Another sign of low progesterone is a shortened luteal phase that lasts less than 10 days.

There are several things you can do to boost deficient progesterone levels. Clearly, visiting a doctor to discuss the nuances of a particular issue may be the best first option. However, a fertility supplement, like FertilAid for Women, may help to bring progesterone levels into an ideal range for achieving pregnancy.

Women with a history of miscarriage can also use natural progesterone cream as soon as they know they have ovulated, to supplement their own progesterone; however, natural progesterone creams should not be used until ovulation takes place. Consult your physician for more information on the benefits of progesterone and uses/applications.

Other Applications of Progesterone

Progesterone has many other functions, among them protecting against fibrocysts, helping the body use fat for energy, and helping normalize blood clotting and blood sugar levels. Today, many health professionals claim that the symptoms associated with PMS and menopause are due not so much to estrogen, but to a deficiency of progesterone and an overabundance of estrogen. It is believed that progesterone balances estrogen and that an overproduction of estrogen can lead to health problems. However, consult your physician if you have any questions about using natural progesterone creams.

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> Anovulation
> Short Cylces Why are short menstrual cycles a possible TTC issue?


We have been trying for a baby for over 6 months. 2 Months ago i started using ovulation tests to try and pin point the best times to start trying but noticed that they never picked up a LH level. I have just had my blood test results back and have found out i do ovulate but me hormone levels are below average - results 27.7, should be over 30. They want to carry out another test next month on day 21 again. What can be done to help increse this? Is this level really low? I am scared!

I have child and have been trying for another for 18month had no trouble conceiving first time round but am now I have had blood tests which have come back ok but was ask to have progesterone bloods test done which has come back low. So need to have it done again my period was early would that have anything to do why it was low?? Also when I have worked out day 21 it's on a weekend the doctor said I need to wait till next month to have it done again does anyone have any ideas so I don't have to wait?? My cycle was 26 days do I still count 21 days to have the test again??

when am i supossed to take the 21 day progesterone test

i want to know when do i take the test for day 21 progesterone

Looking for help and advice please we have being trying for a baby for the past year i had my first bloods done last week and it came back at 16 i have been told it has to be over 30 in order to conveive im waiting on an apointment for the hospital is there anything i can do in the mean time in so upset waiting on him to come home and tell him the bad news dont know what do you. If you can help and make me feel better please write back.

Hi guys im new to this. I normally have a 30 day cycle without fail. We suffered a misscarrage recently and have een trying again. Had a snapshot hormone test which showed progesterone at 2.8, this was thought to mean i may not be ovulating and they wished to repeat the test (this was day 17). I contacted early pregnancy unit to ak when i should have my blood taken in a 30 day cycle - i was told day 23. My result at day 23 came back at 7.2 which still is low (knowing over 30 = ovulation. i went and asked fertility unit to look at my results and they said to take it today just to see (day 28 of a 30 day cycle) tha result has come back as 41!!! my thought here is that perhaps my period will be late as maybe i have ovulated later that expected or that i always ovulate later than the average? in other words try not to worry you maye ovulating later and may need to have a test later on inyour cycle just to check. Trying not to get my hope up with pregnancy ut that would e the best news ever. Good luck to you all x

Hi i learnt yesterday that my Progesterone levels are low 3.8 by my GP. i was shocked to say the least! with this shock i didnt ask the question I now know i should have. My GP told me it could be early menapause? im 33 how can this be?
im devastated and i hate it - not in to see teh GP unil next weds again. in the meantime i have had another blood test and im praying im not going through the menapause!!!
I cant understand any of this or why my levels have dropped... Any advice would be really appriciated. im even too scared to discuss this with my partner and know thats not right... I feel that we shoul dhave had children earlier and not focused on work work work.... i feel responsible...

I have not had a period since 2007 right before my daughter was conceived. Now we are trying for our second child and have had no luck, my progesterone level was 0.3 and I was started on prometrium 200 mg daily, still no period, wonder if thus will get better??

I have not had a period since 2007 right before my daughter was conceived. Now we are trying for our second child and have had no luck, my progesterone level was 0.3 and I was started on prometrium 200 mg daily, still no period, wonder if thus will get better??

I have PCOS(polycystic ovary syndrome)and have irregular cycles.Its almost a year we are trying for pregnancy .iam in second round of clomid tablets(100mg)from day 5th-day 9th after my period,and from day 9 onwards prometrium tablets(1 tablet.daily),in addition with this im taking metformin tablets daily(3 tablets per day).After 21 days from my period,ill be taken progesterone blood work.Now in the second month(2nd round)of my clomid medication,my progesterone blood test result is 59.8ng/ml and in my 1st month my progesterone was 40.3ng/ml.What does it mean?I think my progesterone is getting increased after the high dose of clomid..but what will be progesterone level to bet pregnant..How long my level should increase from 59.8ng/ml?Does anyone know..pls advice me and comment on my post..Hoping for replies!!!

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