Ask Our Doctors – Archive
Our Medical Directors are outstanding physicians that you will find to be very personable and compassionate, who take care to ensure that you have the most cutting-edge fertility treatments at your disposal. This is your outlet to ask your questions to the doctors.
hi dr Sher
I had embryo transfer on august 31st( blastocyst normal PGS tested) and today( sept 14) my beta hcg is 1332.8. My doctor asked me to continue crinone, duphaston, femoston and remaining progynova until next week. Next week she will do the blood test again. My progesteron level today is 7.4 and my doctor said it was a good number considering i’m still at 4 weeks gestation. I read some articles it said progesteron level must be above 20. I am a bit confuse here but i don’t want to argue with my doctor since she is a professional in her fields. Another articles said if use crinone as progesteron suppositories it will goes directly to uterus and bypassing the bloodstream so the progesteron level won’t be detected in the blood test but the uterus get enough of it. According to your expertise, Do you think my progesteron level is low? and need more suppositories or injection? If yes until what week is optimal?
Best regard,
Sandra
It is low, but I agree with your RE that vaginally administered progesterone goes directly via the uterus to the blood stream and will not manifest with the same rise in progesterone that injections will. Thus it is a toss-up between PIO and vaginal Crinone (etc).
Geoff Sher
Hi Dr. Sher,
I was just informed our only 5 day embryo came back as mosaic monosomy 8. Would it be possible to transfer this embryo and have a healthy baby? What would you recommend? What is the potential worst case scenario – failure to implant, miscarriage or a sick baby and if the latter, what are the defects for a baby born with this missing chromosome? Thank you!
In my opinion, there is no reliable way diagnose mosaicism in an embryo.
Human embryo development occurs through a process that encompasses reprogramming, sequential cleavage divisions and mitotic chromosome segregation and embryonic genome activation. Chromosomal abnormalities may arise during germ cell and/or pre-implantation embryo development, and represents a major cause of early pregnancy loss. About a decade ago, I and an associate, Levent Keskintepe Ph.D were the first to introduce full embryo karyotyping (identification of all 46 chromosomes) through preimplantation genetic sampling (PGS) as a method by which to selectively transfer only euploid embryos (i.e. those that have a full component of chromosomes) to the uterus. We subsequently reported on a 2-3 fold improvement in implantation and birth rates as well as a significant reduction in early pregnancy loss, following IVF. Since then PGS has grown dramatically in popularity such that it is now widely used throughout the world.
Most IVF programs that offer PGS services, require that all participating patients consent to all their aneuploid embryos (i.e. those with an irregular quota of chromosomes) be disposed of. However, there is now growing evidence to suggest that following embryo transfer, some aneuploid embryos will in the process of ongoing development, convert to the euploid state (i.e. “autocorrection”) and then go on to develop into chromosomally normal offspring. In fact, I am personally aware of several such cases occurring within our IVF network. So clearly , summarily discarding all aneuploid embryos as a matter of routine we are sometimes destroying some embryos that might otherwise have “autocorrected” and gone on to develop into normal offspring.
Thus by discarding aneuploid embryos the possibility exists that we could be denying some women the opportunity of having a baby. This creates a major ethical and moral dilemma for those of us that provide the option of PGS to our patients. On the one hand, we strive “to avoid knowingly doing harm” (the Hippocratic Oath) and as such would prefer to avoid or minimize the risk of miscarriage and/or chromosomal birth defects and on the other hand we would not wish to deny patients with aneuploid embryos, the opportunity to have a baby.
The basis for such embryo “autocorrection” lies in the fact that some embryos found through PGS-karyotyping to harbor one or more aneuploid cells (blastomeres) will often also harbor chromosomally normal (euploid) cells (blastomeres). The coexistence of both aneuploid and euploid cells coexisting in the same embryo is referred to as “mosaicism.” As stated, some mosaic embryos will In the process of subsequent cell replication convert to the normal euploid state (i.e. autocorrect)
It is against this background, that an ever increasing number of IVF practitioners, rather than summarily discard PGS-identified aneuploid embryos are now choosing to cryobanking (freeze-store) certain of them, to leave open the possibility of ultimately transferring them to the uterus. In order to best understand the complexity of the factors involved in such decision making, it is essential to understand the causes of embryo aneuploidy of which there are two varieties:
1.Meiotic aneuploidy” results from aberrations in chromosomal numerical configuration that originate in either the egg (most commonly) and/or in sperm, during preconceptual maturational division (meiosis). Since meiosis occurs in the pre-fertilized egg or in and sperm, it follows that when aneuploidy occurs due to defective meiosis, all subsequent cells in the developing embryo/blastocyst/conceptus inevitably will be aneuploid, precluding subsequent “autocorrection”. Meiotic aneuploidy will thus invariably be perpetuated in all the cells of the embryo as they replicate. It is a permanent phenomenon and is irreversible. All embryos so affected are thus fatally damaged. Most will fail to implant and those that do implant will either be lost in early pregnancy or develop into chromosomally defective offspring (e.g. Down syndrome, Edward syndrome, Turner syndrome).
2.“Mitotic aneuploidy” occurs when following fertilization and subsequent cell replication (cleavage), some cells (blastomeres) of a meiotically euploid early embryo mutate and become aneuploid. This is referred to as mosaicism. Thereupon, with continued subsequent cell replication (mitosis) the chromosomal make-up (karyotype) of the embryo might either comprise of predominantly aneuploid cells or euploid cells. The subsequent viability or competency of the conceptus will thereupon depend on whether euploid or aneuploid cells predominate. If in such mosaic embryos aneuploid cells predominate, the embryo will be “incompetent”). If (as is frequently the case) euploid cells prevail, the mosaic embryo will be “competent” and capable of propagating a normal conceptus.
Since some mitotically aneuploid (“mosaic”) embryos can, and indeed do “autocorrect’ while meiotically aneuploid embryos cannot, it follows that an ability to differentiate between these two varieties of aneuploidy would be of considerable clinical value. And would provide a strong argument in favor of preserving certain aneuploid embryos for future dispensation.
Aneuploidy, involves the addition (trisomy) or subtraction (monosomy) of one chromosome in a given pair. As previously stated, some aneuploidies are meiotic in origin while others are mitotic “mosaics”. Certain aneuploidies involve only a single, chromosome pair (simple aneuploidy) while others involve more than a single pair (i.e. complex aneuploidy). Aside from monosomy involving absence of the y-sex chromosome (i.e. XO) which can resulting in a live birth (Turner syndrome) all monosomies involving autosomes (non-sex chromosomes) are lethal and will not result in viable offspring). Some autosomal meiotic aneuploidies, especially trisomies 13, 18, 21, can progress to viable, but severely chromosomally defective babies. All other meiotic autosomal trisomies will almost invariably, either not attach to the uterine lining or upon attachment, will soon be rejected. All forms of meiotic aneuploidy are irreversible while mitotic aneuploidy (“mosaicism) often autocorrects in the uterus. Most complex aneuploidies are meiotic in origin and will almost invariably fail to propagate viable pregnancies.
There is presently no microscopic or genetic test that can reliable differentiate between meiotic and mitotic aneuploidy. Notwithstanding this, the fact that some “mosaic” embryos can autocorrect in the uterus, makes a strong argument in favor of transferring aneuploid of embryos in the hope that the one(s) transferred might be “mosaic” and might propagate viable healthy pregnancies. On the other hand, it is the fear that embryo aneuploidy might result in a chromosomally abnormal baby that has led many IVF physicians to strongly oppose the transfer of any aneuploid embryos to the uterus.
While certain meiotic aneuploid trisomies (e.g. trisomies 13, 18, & 21) can and sometimes do result in chromosomally defective babies, no other meiotic autosomal trisomies can do so. Thus the transfer of trisomic embryos in the hope that one or more might be mosaic, should exclude the use of embryos with trisomies 13, 18 or 21. Conversely, no autosomal monosomic embryos are believed to be capable of resulting in viable pregnancies, thereby making the transfer of autosomally monosomic embryos, in the hope that they are “mosaic”, a far less risky proposition. Needless to say, if such action is being contemplated, it is absolutely essential to make full disclosure to the patient (s) , and to insure the completion of a detailed informed consent agreement which would include a commitment by the patient (s) to undergo prenatal genetic testing aimed at excluding a chromosomal defect in the developing baby and/or a willingness to terminate the pregnancy should a serious birth defect be diagnosed.
Geoff Sher
Hello Dr Sher! I am reading study after study and can’t find an answer to this. Can you please help? I have an 11.7mm follicle and E2 is 123. I have a history or surging prematurely so I am thinking to add half ganirelix plus 75iu of Follistim at 11.7mm. Is this a good idea or will my small follicle get damaged if I add the antagonist at this size?( FSH is 9.75, LH 8.31, P4 0.37). My doctor is leaving it up to me and I can’t work it out. I am doing natural cycle IVF. I will greatly appreciate your help. Regards. Kate.
I do not think it would hurt. This is likely premature luteinization…see below:
Premature luteinization (“premature LH surge”) occurs when prior to the planned initiation of the hCG trigger, a progressive rise in LH, irreversibly compromises follicle and egg development and maturation. It is not a sporadic isolated event. It comes as a culmination of a series ovarian events, occurring mostly in susceptible women (i.e. usually older women and those with diminished ovarian reserve. It is more likely to occur when the protocol used for ovarian stimulation has failed to maintain LH activity at a low level prior to and throughout the ovarian stimulation process. Once it occurs in any given stimulation cycle it cannot be switched off by changing the stimulation in progress or by administering GnRH antagonists (e.g. Ganirelix/Cetrotide/Orgalutron) midway in the cycle in the hope that this could rescue the eggs under development. It is my opinion, once premature luteinization commences, the cycle is doomed and outcome is doomed to fail. The condition increases the likelihood of premature ovulation, failed release of eggs during needle-guided egg retrieval (so called “empty follicle syndrome” and the incidence of egg/embryo “incompetence” (chromosomal aneuploidy).
This situation is most commonly seen in older women and in women who have severely diminished ovarian reserve. In many cases its effect can be prevented through implementation of strategic and individualized protocols for controlled ovarian stimulation (COS) coupled with optimizing the type, timing and dosage of the “hCG trigger shot.”
Normally, following optimal ovarian stimulation, the “trigger shot” is given for the purpose of it initiating meiosis (reproductive division) that is intended to halve the number of chromosomes from 46 to 23 within 32-36 hours. The hCG trigger also enables the egg to signal the “cumulus cells” that bind it firmly to the inner wall of the follicle (through enzymatic activity), to loosen or disperse, so that the egg can detach and readily be captured at egg retrieval (ER).
Older women, and women with diminished ovarian reserve, tend to have more biologically active LH in circulation. LH causes production of male hormone (androgens, predominantly testosterone), by ovarian connective tissue (stroma/theca). A little testosterone is needed for optimal follicle development and for FSH-induced ovogenesis (egg development). Too much LH activity compromises the latter, and eggs so affected are far more likely to be aneuploid following meiosis.
Women with the above mentioned conditions often have increased LH activity and are thus more likely to produce excessive ovarian testosterone. It follows that sustained, premature elevations in LH or premature luteinization (often referred to as a “premature LH surge”) will prejudice egg development. Such compromised eggs are much more likely to end up being complex aneuploid following the administration of the hCG trigger, leading to fruitless attempts at retrieval and the so called “empty follicle syndrome.”
The developing eggs of women who have increased LH activity (older women, and women with diminished ovarian reserve) are inordinately vulnerable to the effects of protracted exposure to LH-induced ovarian testosterone. Because of this, the administration of medications that provoke further pituitary LH release (e.g., clomiphene and Letrozole), drugs that contain LH or hCG (e.g., Menopur), or protocols of ovarian stimulation that provoke increased exposure to the woman’s own pituitary LH (e.g., “flare-agonist protocols”) and the use of “late pituitary blockade” (antagonist) protocols can be prejudicial.
The importance of individualizing COS protocol selection, precision with regard to the dosage and type of hCG trigger used, and the timing of its administration in such cases cannot be overstated. The ideal dosage of urinary-derived hCG (hCG-u) such as Novarel, Pregnyl and Profasi is 10,000U. When recombinant DNA-derived hCG (hCG-r) such as Ovidrel is used, the optimal dosage is 500mcg. A lower dosage of hCG or Ovidrel can, by compromising meiosis, increase the risk of egg aneuploidy, and thus of IVF outcome.
Geoff Sher
800-780-7437
dear dr. sher
thank you for your answers and your patience
what do you think abouth this therapy
“Lymphocyte Immunization Therapy or LIT is a procedure whereby white blood cells from the prospective father are injected into the skin of the prospective mother to prepare the maternal immune system for pregnancy. Because pregnancy tissues are the product of both the mothers as well as the fathers genes, LIT assists the mothers immune system in the development of immunologic tolerance to the genetically foreign pregnancy tissues”
It has been banned in the US as it is believed to introduce a risk of transmitting Kreutzfeld (Mad Cow’s) disease . Also, it has been supplanted by Intralipid therapy and possibly IVIG. I never recommend it.
Geoff Sher
I have a 1 yr old healthy baby from my last FET cycle. We have no embryos left from his batch . I have 2 healthy pgd pgs tested embroyos frozen last year when i did embryo extraction back to back. Im breastfeeding my 1 yr old. Im 29yr old healthy female. When di you think we are ready foe next implant. We just need one more kid. So would like to maximize the chance from these 2 embryo. (Ps- i had only 1 FET failure before my son with the same set of embryo that is available nw. My son was the only surviving healthy embryo from his batch). Please advise
I would wean the baby off the breast first, wait for a few regular menstrual cycles and then proceed.
Geoff Sher