Ovarian Stimulation in IVF: Why It Is Important to Down-Regulate LH
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Suboptimal controlled ovarian stimulation (COS) protocols, especially in older women and those with diminished ovarian reserve, can increase the occurrence of egg/embryo numerical chromosomal abnormalities (aneuploidy), thereby reducing the chance of implantation and increasing the incidence of chromosomal miscarriages and birth defects (e.g., Down syndrome).
Maturation is a conclusive developmental event, designed to fine tune biological systems so as to optimize function. But optimal maturation cannot take place in a vacuum. Without exception, it requires prior, orderly development of numerous preliminary molecular-biological systems. In the case of the egg, optimal development (ovogenesis) requires a perfect functional interaction of countless intracellular microsystems, all designed to effect and regulate orderly chromosomal segregation during reproductive division (meiosis). It follows that factors that are capable of influencing such preovulatory molecular nuclear-cytoplasmic events will profoundly influence the ultimate numerical chromosomal integrity of the mature egg, which in turn will largely determine embryo “competency”.
While a small amount of luteinizing hormone (LH)-induced male hormones (androgens, mainly testosterone), produced by ovarian connective tissue (stroma or theca) is essential for orderly follicle and egg development, overexposure to androgen-testosterone can be decidedly detrimental, leading to dysfunctional follicle and egg development, an increased likelihood of egg aneuploidy, and thus a reduced chance of a successful pregnancy. It follows that women who intrinsically manifest with increased endogenous (self-produced) pituitary LH activity as well as those that through medical treatment become overexposed to LH, will have an increased predisposition to producing aneuploid eggs/embryos.
The connective tissue surrounding ovarian follicles (stroma or theca) represents the main site of ovarian androgen production. Here, chronic over-exposure to LH activity can lead to overgrowth (stromal hyperplasia or hyperthecosis). This characteristically is seen in older women, women with diminished ovarian reserve (DOR), and those with polycystic ovarian syndrome (PCOS), who often have exaggerated endogenous LH activity. In such cases, the increased the ovarian stromal tissue/theca presents a “greater target” for LH to act on. Thus, unless in such cases LH levels are kept low prior to and during COS, the exaggerated androgen environment created can result in abnormal follicle growth and egg development, with increased egg/embryo aneuploidy and compromised outcome.
The use of strategically designed, individualized ovarian stimulation protocols that are comprised primarily of purified recombinant FSH (FSHr), (rather that urinary-derived gonadotropins such as Menopur that in addition to FSH, also contain high concentrations of LH/hCG), as well as the preferential use of long pituitary LH down-regulation protocols (that suppress LH prior to and during COS) will in such cases, go a long way towards minimizing the risk of this happening. Conversely, compounds such as clomiphene citrate and Letrozole, as well as microdose “flare” protocols which by their very nature increase pituitary output of LH release, and late antagonist protocols that belatedly block LH several days after the commencement ovarian stimulation, can be particularly harmful to these women in my opinion.
It is certainly time for us to reflect seriously on what and why we use specific COS protocols and drugs in IVF. Perhaps we should focus more upon optimizing ovogenesis rather than simply on how to increase the total egg yield. Personally, I strongly favor the use of FSHr-dominant, long pituitary down-regulation protocols that reduce LH, especially when conducting COS in older women, women with DOR, and those with PCOS.
10 Responses to “Ovarian Stimulation in IVF: Why It Is Important to Down-Regulate LH”
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I am 37 years old and have had three failed IVF cycles with the same clinic. All three cycles were 10-21 days of birth control pills followed directly by simulation medications (150 of menopur and varying amnts of follistim) with Ganirelix added the last three days. We retrieved a 15-20 mature eggs with each cycle but had low fertilization and only 2 blasts on day 5 and 1 blast on day 6. We transferred a total of 3 blasts and 3 morulas. My RE concluded that I have a higher than expected number of eggs with chromosome abnormalities and recommended donor eggs. I am with a new clinic now that recommends a natural start Lupron protocol beginning on day 21 of my cycle. Is there a reason to believe this would be more successful?
I cannot comment above saying that the protocol used for ovarian stimulation is a very important factor in determining egg/embryo quality and hence IVF outcome. Please to the home page on this site, find a “search bar” in the upper right hand column and type in the following subjects into the bar and it will take you to all the relevant articles I posted there.
“An Individualized Approach to Ovarian stimulation” (posted on November 22nd, 2010)
“Ovarian Stimulation in IVF: Why is it important to down-regulate LH?”
“Agonist/Antagonist Conversion Protocol”
“Embryo Implantation………” (Part-1 and Part- 2—-Posted August 2012)
“Traveling for IVF from Out of State/Country– The Process at SIRM-Las Vegas” (posted on March, 21st 2012)
“A personalized, stepwise approach to IVF at SIRM”; Parts 1 & 2 (posted March, 2012)
“IVF success: Factors that influence outcome”
“Staggered IVF”
Since you reside in the NY area, consider calling 646-792-7476 (SIRM-New York) and arrange to have a consultation with Dr Tortoriello).
Geoff Sher
I should also mention – my e2 was always in the upper 3,000s and I was triggered when my lead follicle was 17 but many others were around 14-15.
I personally trigger when at least 2 follicles are greater than 18 mm and at least half are above 15mm.
Geoff Sher
I’m just wondering — you talk about how stepwise increases in LH are bad for egg quality, but how high is too high for LH? The protocol I am on currently uses femara, and clomid along with follistim — which after a fair bit of reading of your website, I can see you don’t recommend because they both increase LH. My initial day 2 LH was 3, FSH was 5. A week later, 5 days after starting the femara, and 3 days after starting the follistim 75u, my estrogen was 140, P 0.8, LH was 10, and FSH was 9. I know that during the LH surge, it should spike to like 70 — but how high do you think it needs to be before it is detrimental to egg quality? If it stays sort of low – like under 20 – is that safe enough, or do I need to be worried that even those levels are negatively impacting my chances of success?
It is too late for me to change anything in this cycle I think, since the only thing I could do now would be to add in a GnrH antagonist to block LH production – and I’m not sure that’s advisable. Is that advisable? Should I be asking for that right now before LH increases and has a chance to do any damage? Or is it too late and I just have to go with it, watch my numbers and then see what happens? Naturally, I want to do everything possible to make this cycle a success, and not have to start over. Any thoughts?
Gretchen
An LH of 10MIU/ml in the peripheral blood is high but what really matters is the local ovarian androgen level, which is not readily reflected by peripheral blood levels because of a dilution effect……..The local ovarian concentration of androgens is several times higher than diluted peripheral blood levels. Femara and Letrozole are good drugs when given to women with normal ovarian reserve. They both induce ovulation through causing a generalized increase in hypothalamic GnRH, intended to increase pituitary FSH so as to promote folliculogenesis. However, GnRH also elicits concurrent pituitary LH release, which is not very prejudicial in women with normal ovarian reserve, however, in my opinion, because women with DOR have increased ovarian stroma (theca) which produces androgens (mainly testosterone) in response to LH, even modest elevations in LH can cause in their ovaries a considerable and disproportionate excess in stromal (thecal)production of androgens.This, I believe in women with DOR could be harmful to egg development (ovogenesis),ultimately leading to an increase in meiotic aneuploidy with dire consequences.
It is almost certainly too late for you to change course in the midst of a cycle. There is no point in adding an antagonist midway through stimulation. I would see this cycle through as planned.
I hope that this does not apply in your case and that you will be successful.
Good luck!
Geoff Sher
Hi,
Do you think that a dose of 75 Luveris (together with Gonal ) could be good during stimulation for DOR and over 40 years old?
Thank you
It depends on your specifics!
Geoff Sher
I am 35. I have a low AMH of 2.5pmol/L. I just completed one failed IVF. I took no drugs in the previous cycle and started Puregon 200 on day 3 of the IVF cycle. I had a scan on cycle day 8 which showed 6 follicles all at different sizes. By retrieval day, I had 4 follicles 22mm, 20mm, 14mm & 10mm. They only took one egg out and the genetic material in it started disintegrating at day 2 so it could not be transferred. Could I get your opinion as to how you would proceed with my next IVF taking into account my low AMH and that I would like to have more eggs to work with next round (ie. more follicles growing at the same rate).
HiMichelle,
From reading this blog you must know that I do not use the type of protocol you allude to …especially in women with diminished ovarian reserve. Please read articles; 1,2& 3 below and then perhaps also the ones on Staggered IVF and Embryo Banking, below.
Please go to the home page of this blog, http://www.IVFauthority.com. When you get there, look for a “search bar” in the upper right hand corner. Type the following subjects into the bar, click on it and it will take you to all the relevant articles posted there.
1. “An Individualized Approach to Ovarian stimulation” (posted on November 22nd, 2010)
2. “Ovarian Stimulation in IVF: Why is it important to down-regulate LH?”
3. “Agonist/Antagonist Conversion Protocol”
4. “Traveling for IVF from Out of State/Country– The Process at SIRM-Las Vegas” (posted on March, 21st 2012)
5.“A personalized, stepwise approach to IVF at SIRM”; Parts 1 & 2 (posted March, 2012)
6. “IVF success: Factors that influence outcome”
7. “Staggered IVF”
8.“Embryo Banking”
Consider calling 800-780-7437 or 702-699-7437 to arrange a Skype consultation (free of charge to those who reside in the United States or Canada) with me so we can discuss your case in detail
Geoff Sher