Significance of (sub)clinical thyroid dysfunction and thyroid autoimmunity before conception and in early pregnancy: a systematic review

BACKGROUND

Thyroid dysfunction and thyroid autoimmunity are prevalent among women of reproductive age and are associated with adverse pregnancy outcomes. Preconception or early pregnancy screening for thyroid dysfunction has been proposed but is not widely accepted. We conducted a systematic review of the literature on the clinical significance of thyroid dysfunction and thyroid autoimmunity before conception and in early pregnancy.

METHODS

Relevant studies were identified by searching Medline, EMBASE and the Cochrane Controlled Trials Register.

RESULTS

From a total of 14 208 primary selected titles, 43 articles were included for the systematic review and 38 were appropriate for meta-analyses. No articles about hyperthyroidism were selected. Subclinical hypothyroidism in early pregnancy, compared with normal thyroid function, was associated with the occurrence of pre-eclampsia [odds ratio (OR) 1.7, 95% confidence interval (CI) 1.1–2.6] and an increased risk of perinatal mortality (OR 2.7, 95% CI 1.6–4.7). In the meta-analyses, the presence of thyroid antibodies was associated with an increased risk of unexplained subfertility (OR 1.5, 95% CI 1.1–2.0), miscarriage (OR 3.73, 95% CI 1.8–7.6), recurrent miscarriage (OR 2.3, 95% CI 1.5–3.5), preterm birth (OR 1.9, 95% CI 1.1–3.5) and maternal post-partum thyroiditis (OR 11.5, 95% CI 5.6–24) when compared with the absence of thyroid antibodies.

CONCLUSIONS

Pregnant women with subclinical hypothyroidism or thyroid antibodies have an increased risk of complications, especially pre-eclampsia, perinatal mortality and (recurrent) miscarriage. Future research, within the setting of clinical trials, should focus on the potential health gain of identification, and effect of treatment, of thyroid disease on pregnancy outcome.

Source:
http://humupd.oxfordjournals.org/rss/current.xml

Chromosomal mosaicism in human preimplantation embryos: a systematic review

BACKGROUND

Although chromosomal mosaicism in human preimplantation embryos has been described for almost two decades, its exact prevalence is still unknown. The prevalence of mosaicism is important in the context of preimplantation genetic screening in which the chromosomal status of an embryo is determined by the analysis of a single cell from that embryo.

METHODS

Here we report a systematic review and meta-analysis of studies on the chromosomal constitution of human preimplantation embryos. In 36 studies, out of 2117 citations that met our search criteria, data were provided extensively enough to allow classification of each analysed embryo with prespecified criteria for its chromosomal makeup. The main outcome of this classification was the prevalence of chromosomal mosaicism in human preimplantation embryos.

RESULTS

A total of 815 embryos could be classified. Of these, 177 (22%) were diploid, 599 (73%) were mosaic, of which 480 (59% of the total number of embryos) were diploid–aneuploid mosaic and 119 (14% of the total number of embryos) were aneuploid mosaic, and 39 (5%) contained other numerical chromosomal abnormalities. The distribution of the embryos over these categories was associated with the developmental stage of the embryos, the method used for analysis and the number of chromosomes analysed.

CONCLUSIONS

Diploid–aneuploid mosaicism is by far the most common chromosomal constitution in spare human preimplantation embryos after IVF. This undermines the reliable determination of the ploidy status of a cleavage-stage embryo based on the analysis of a single cell. Future research should determine the origin and developmental potential of mosaic embryos.

Source:
http://humupd.oxfordjournals.org/rss/current.xml

Vasculogenesis: a new piece of the endometriosis puzzle

BACKGROUND

Endometriosis is a complex disease with a multifactorial pathogenesis, which is crucially dependent on the development of new blood vessels. Based on the current literature, the present review highlights the fact that the neovascularization of endometriotic lesions is not only driven by angiogenesis, but also involves de novo formation of microvessels from circulating endothelial progenitor cells (EPCs). This process, termed post-natal vasculogenesis, is a characteristic of various pathogenic conditions, such as tumour growth and atherosclerosis, and typically comprises the activation, mobilization and recruitment of bone marrow-derived EPCs to the sites of tissue hypoxia.

METHODS

Literature searches were performed in PubMed, MEDLINE and ISI Web of Knowledge for publications focusing on vasculogenesis in the endometrium and endometriotic lesions.

RESULTS

Recent studies indicate that up to 37% of the microvascular endothelium of ectopic endometrial tissue originates from EPCs, partly controlled by the stromal-cell-derived factor-1/chemokine receptor type 4 axis. Accordingly, blockade of EPC recruitment effectively inhibits the formation of microvascular networks in developing endometriotic lesions, indicating that vasculogenesis represents an integral part of the pathogenesis of endometriosis.

CONCLUSIONS

The involvement of vasculogenesis in endometriosis may offer the exciting opportunity for the future establishment of novel diagnostic and therapeutic strategies for this frequent gynaecological disease.

Source:
http://humupd.oxfordjournals.org/rss/current.xml

Endometrial alterations in endometriosis: a systematic review of putative biomarkers

BACKGROUND

Endometriosis is usually diagnosed by an invasive procedure such as a laparoscopy. Great interest therefore lies in the potential to identify biomarkers which may be surrogates of disease presence or activity, especially relating to the effects of therapy. We have reviewed the existing literature on endometrial differences in women with endometriosis, and assess their potential use as disease biomarkers.

METHODS

We used QUADAS (Quality Assessment of Diagnostic Accuracy Studies) criteria to conduct a systematic review of published papers over the past 25 years on the subject of endometrial differences in endometriosis. We searched for all studies assessing differences between eutopic endometrium of women with and without endometriosis.

RESULTS

We identified 182 relevant articles that are summarized in the review. These studies assess over 200 potential biomarkers, including hormones and their receptors (n = 29), cytokines (n = 25), factors identified using proteomics (n = 8) and histological analysis (n = 10) of endometrial tissue. Sensitivity and specificity were reported or could be calculated for only 32 articles, and ranged from 0 to 100%. Of the nine highest quality studies, six identified putative biomarkers related to nerve fibre growth or cell cycle control, highlighting these areas as promising candidates for future biomarker research.

CONCLUSIONS

This systematic review identified several reports of endometrial differences which have the potential to be biomarkers of endometriosis. However, larger studies in well-defined populations are clearly required to determine their true usefulness.

Source:
http://humupd.oxfordjournals.org/rss/current.xml

Gamete competence assessment by polarizing optics in assisted reproduction

Background

The purpose of this study was first to give an overview of the historical development of polarization microscopy, second to describe the various applications of this technique in assisted reproduction techniques (ART) and third to discuss the potential benefit of polarization microscopy as a predictor for IVF success.

Methods

The history of polarization microscopy was undertaken by performing a backward search in the scientific literature using Google and internet sites of several Societies for Microscopy and Cell Biology. Studies of polarization microscopy in ART were identified by using a systematic literature search in PubMed and Scopus.

Results

A total of 62 articles were identified by the direct search and further relevant articles were found by screening the cited literature in these articles. The topics relevant for assisted reproduction were spindle and zona imaging in combination with IVF success, meiotic cell cycle progression, pharmaceutical studies and cryopreservation. A separate topic was the use of sperm birefringence in ART.

Conclusions

The majority of studies are observational studies and were not performed in a randomized manner and there is no direct comparison of techniques using other gamete selection markers. Despite this, most studies show that polarization microscopy may help us to further increase our knowledge on gametes and meiosis. Whether certain applications such as spindle or zona imaging may lead to an increase in IVF success is unclear at present. Publications on the use of polarization microscopy on sperm are still very limited.

Source:
http://humupd.oxfordjournals.org/rss/current.xml

Functional relationship between obesity and male reproduction: from humans to animal models

BACKGROUND

The increase in the incidence of obesity has a substantial societal health impact. Contrasting reports have been published on whether overweight and obesity affect male fertility. To clarify this, we have reviewed published data on the relation between overweight/obesity, semen parameters, endocrine status and human male fertility. Subsequently, we have used results obtained in animal models of obesity to explain the human data.

METHODS

Pubmed, Scopus, Web of Science and Google Scholar databases were searched between September 2009 and October 2010 for a comprehensive publication record. Available studies on adult human males were examined. The included animal studies examined obesity and fertility, and focused on leptin, leptin receptor signaling, kisspeptins and/or NPY.

RESULTS

Most overweight/obese men do not experience significant fertility problems, despite the presence of reduced testosterone alongside normal gonadotrophin levels. Only a subgroup of subjects suffers from hypogonadotropic hypogonadism. Animal models offer several explanations and show that reduced leptin signaling leads to reduced GnRH neuronal activity. This may be due to decreased hypothalamic Kiss1 expression, a potent regulator of GnRH/LH/FSH release. As the Kiss1 neurons express leptin receptors, the Kiss1 system may participate in transmitting metabolic information to the GnRH neurons, thus providing a bridge between metabolic regulation and fertility.

CONCLUSIONS

Infertility in overweight/obese males may be explained by leptin insensitivity. This implies a possible role for the KISS1 system in human obesity-related male infertility. If substantiated, it will pave the way for methods to restore fertility in these subjects.

Source:
http://humupd.oxfordjournals.org/rss/current.xml

Absolute asthenozoospermia and ICSI: what are the options?

BACKGROUND

Complete asthenozoospermia, i.e. 100% immotile spermatozoa in the ejaculate, is reported at a frequency of 1 of 5000 men. Its diagnosis implies a poor fertility prognosis even with ICSI. It is extremely important to distinguish between two different groups of patients with complete asthenozoospermia, i.e. virtual or absolute asthenozoospermia. With the former group having some motile spermatozoa after extensive processing of the semen, absolute asthenozoospermia can be associated with metabolic deficiencies, ultrastructural abnormalities of the sperm flagellum, necrozoospermia otherwise it can be idiopathic. In the management of persistent absolute asthenozoospermia, it is very important to elucidate its nature and whenever possible to correct the potential causes.

METHODS

We reported data published in the literature on the aetiology of absolute asthenozoospermia and the different techniques to improve ICSI outcome. We propose an algorithm for diagnosis and treatment of this condition.

RESULTS

Different results regarding fertilization, cleavage and pregnancy rate have been published in patients with absolute asthenozoospermia undergoing ICSI. However, the results vary widely depending on the sperm origin and the technique applied for immotile sperm selection. The percentage of viable spermatozoa varies between 0 and 100%.

CONCLUSIONS

Absolute immotile spermatozoa is one of the most important causes of reduced fertilization and pregnancy rates after ICSI and different techniques are used to improve ICSI outcomes. However, it still remains unclear which is the best technique to improve the pregnancy outcomes in these couples.

Source:
http://humupd.oxfordjournals.org/rss/current.xml

The history of female genital tract malformation classifications and proposal of an updated system

BACKGROUND

A correct classification of malformations of the female genital tract is essential to prevent unnecessary and inadequate surgical operations and to compare reproductive results. An ideal classification system should be based on aetiopathogenesis and should suggest the appropriate therapeutic strategy.

METHODS

We conducted a systematic review of relevant articles found in PubMed, Scopus, Scirus and ISI webknowledge, and analysis of historical collections of ‘female genital malformations’ and ‘classifications’. Of 124 full-text articles assessed for eligibility, 64 were included because they contained original general, partial or modified classifications.

RESULTS

All the existing classifications were analysed and grouped. The unification of terms and concepts was also analysed. Traditionally, malformations of the female genital tract have been catalogued and classified as Müllerian malformations due to agenesis, lack of fusion, the absence of resorption and lack of posterior development of the Müllerian ducts. The American Fertility Society classification of the late 1980s included seven basic groups of malformations also considering the Müllerian development and the relationship of the malformations to fertility. Other classifications are based on different aspects: functional, defects in vertical fusion, embryological or anatomical (Vagina, Cervix, Uterus, Adnex and Associated Malformation: VCUAM classification). However, an embryological-clinical classification system seems to be the most appropriate.

CONCLUSIONS

Accepting the need for a new classification system of genitourinary malformations that considers the experience gained from the application of the current classification systems, the aetiopathogenesis and that also suggests the appropriate treatment, we proposed an update of our embryological–clinical classification as a new system with six groups of female genitourinary anomalies.

Source:
http://humupd.oxfordjournals.org/rss/current.xml

Perimenopausal risk factors and future health

BACKGROUND

Lifestyle changes around the time of menopause have the potential to impact on morbidity and eventual mortality. Here we review this topic to identify how such changes may improve health at perimenopause and beyond.

METHODS

Searches were performed in Medline and other databases. Each subject summary was presented to the ESHRE Workshop Group, where omissions or disagreements were resolved by discussion.

RESULTS

Body weight increases because the decline in physical activity during the perimenopause is greater than the concomitant decline in energy intake. It is imperative to stop smoking before menopause because the risk of acute myocardial infarction rises sharply thereafter. Cardiovascular events can be reduced by managing risk factors, such as hypertension and increased lipids and body weight. Breast cancer risk is increased to a similar extent by hormone use, decreased physical activity, increased calorie intake and alcohol use, all reflecting lifestyle decisions. Smoking, alcohol and exercise may increase or decrease risk of aging brain disorders, especially dementia and Parkinson's disease, while stress is consistently associated with increased risk and a prudent diet is consistently associated with reduced risk. Osteoarthritis frequency increases after 50 years of age and risk is elevated 3-fold by obesity, while risk of osteoporosis can be minimized by smoking cessation, adequate vitamin D intake and regular weight-bearing exercise.

CONCLUSIONS

Lifestyle changes around the time of the perimenopause can reduce the likelihood and severity of heart disease and chronic illness in later years and the cost of care of elderly women.

Source:
http://humupd.oxfordjournals.org/rss/current.xml

Can Diabetes truly be cured or is it just “remission”?

When a diabetic no longer needs medication and has normal blood sugars – do we call it remission or do we call it a cure?

Assume for a moment that you’re a diabetic.  Your fasting blood sugar is 214.  Your hemoglobin A1c – the component of hemoglobin to which glucose is bound – is an unhealthy 7.9.  You are taking nine pills per day in an effort to control your blood sugar, but it does not seem to be working.  This means you are a poorly controlled type 2 diabetic, and your risk of experiencing the deadly effects of unchecked diabetes – heart attacks, strokes, dementia, blindness, kidney failure, loss of sensation in your extremities and amputations – is significantly elevated.

Now, let’s consider a different scenario.

You are a patient at Longevity Medical Clinic. Since we started treating your type 2 diabetes, we have restored your hormone balance to that of a 25-year-old.  Your immune system is more robust and competent than it has been in decades.  Your body fat has dropped from 30% to 15%.  You are lean, strong, and fitter than you were in high school.  You eat a near ideal diet and workout regularly 3 to 5 times per week.  Your fasting blood sugar is now 85, and your hemoglobin A1c is a healthy 5.3.  You are maintaining these great blood sugar levels and yet are taking no diabetic medications whatsoever. The big question: what do we call you?  Are you in remission, or are you cured?

This is the current state of debate in medicine.  A large percentage of type 2 diabetics still make perfectly adequate amounts of insulin.  The problem is that they have developed significant insulin resistance.  If we correct the insulin resistance, their diabetes will essentially disappear.  There are at least two ways to accomplish this.  The first, called bariatric surgery, is more invasive and brings higher risk; nevertheless, this surgery will correct insulin resistance in about 85% of surgery patients.  The less risky path to overcoming insulin resistance, combining aggressive hormonal treatments with significant lifestyle changes, can potentially eliminate symptoms of diabetes in roughly 70% of people.

In 2009, the International Consensus Committee decided that it was probably most appropriate to refer to a diabetic whose robust good health has been restored as “in remission” – not “cured.”  Their reasoning is that most people will eventually return to the old lifestyle that caused the disease in the first place, creating a high probability that they will once more become diabetic.  This reasoning makes sense, based on the behavior of all too many people. But this same committee admitted that the “remission” versus “cure” debate is mostly a matter of opinion, not really based on objective science.

My view is simple. Instead of resting on opinion, preferences, or social and political pressures, I prefer to use the term “cure.” If a person has normal blood sugar and normal insulin levels and is not taking any diabetes medications, I am hard pressed to consider them a diabetic.  But at the same time, I certainly agree that any patient who returns to the lifestyle that caused the diabetes in the first place will almost certainly cause it to recur. Let me give you an analogy from my own experience. Several years ago when I was skiing (in my usual less than cautious manner), I took a nasty fall and broke my left hip.  Today, other than some bony callus at the site of healing, and some scarring on the bone, I have no current evidence of a fractured hip.  I run, I jump, I leap and cavort, and I also continue to ski in a less than cautious manner!  That means I am certainly at risk of fracturing my hip a second time.  Am I cured, or am I in remission? I would say that my hip fracture has been cured, but using the reasoning of the medical community my fracture would be in remission, since my lifestyle might cause me to break my hip again at some time in the future. Sounds like silly reasoning, doesn’t it?

To sum up: the vast majority of people with type 2 diabetes make plenty of insulin.  Their blood sugar is high because they have developed severe insulin resistance.  We know how to correct insulin resistance and to restore patients to health.  The big question that we are now arguing about is not so much whether it can be done, but what we should call it when we have done it.  Some people seem outraged when we suggest that some type 2 diabetics can be cured.  I sincerely don’t want to upset them, so if they prefer, they can substitute the words “in remission” for cured.  I frankly don’t care what we call it.  What I do care about is helping those people with high blood sugars, high insulin, and a high risk of devastating consequences to overcome their problems and lead a longer, healthier life. That’s what we’re working to do every day at Longevity Medical Clinic.

Source:
http://www.longevitymedicalclinic.com/blog/feed/

Low-carb diet may reverse kidney failure in diabetics, says new research

A new study shows that a low carbohydrate, high fat diet, used typically to treat and control seizures in children with epilepsy, may reverse kidney failure in people with diabetes.

Researchers from Mount Sinai School of Medicine have found that the ketogenic (low carbs, high fat) diet is useful as many cells can get energy from ketones.

Ketones are molecules produced when the blood glucose levels are low and blood fat levels are high. It has been shown that when cells use ketones instead of glucose for energy, glucose is not metabolized. As high glucose metabolism is what causes kidney failure in diabetics, the Mount Sinai researchers theorized that introducing a ketogenic diet would work to block the toxic and very harmful effects of the glucose. Read more...

AyurGold for Healthy Blood

Source:
http://anti-aging-for-today.blogspot.com/feeds/posts/default?alt=rss

Former Seasteading Institute directors launch seasteading venture

Seasteading is poised to move forward in some big ways, including a new venture being launched by former Seasteading Institute staff. Max Marty and Dario Mutabdzija, former directors of business and legal strategy respectively, are starting a seasteading venture named Blueseed. Blueseed will create a visa-free technology incubator for startups and knowledge workers in international waters off the coast of the San Francisco Bay Area. For more information, visit blueseed.co.

Horse Surfing – A Fun Friday Post

Horses think horse surfing is hilarious.

It’s Friday, and if you’ve had a week like I did, you probably need a good laugh. So when I randomly came across this picture, I knew I had to write a post about it. It appears that it’s as simple as it looks – a horse traveling up to 35 miles per hour pulls a surfer through the waves behind him. Just a horse pulling a surfer. Horse surfing.

Not surprisingly, there aren’t any pictures of horse surfing on Flickr. So, I’ll provide you with a link to a site with some really nifty photos about horse surfing in England. Check them out — it’s pretty bizarre. Happy Friday!

The Independent Horse

Photo: katieblench

Taking Interesting Beach Photos

I will be the first to tell you that I am no photography expert – not by far! But, I do absolutely adore beaches, and I always take my camera with me, grains of sand be darned. When you take about 1,000 photos of beaches in one year, you’re bound to get a few that turn out well. I’ve learned a lot about how to frame shots and how to not fall into the trap of “cliche” beach shots, though I still do take plenty of those. But on the other hand, who cares? Cliche shots can be very pretty.

I thought it would be neat to share what I’ve learned from a couple of my own photos and then include a bunch of really fabulous, creative beach photos I’ve found on Flickr. Some people really have a good eye — it’s all about realizing that a beach is more than just sun, sand and water.

First up – My husband and I watched the sun set on Eagle Beach for a good hour, and took about 300 pictures. I took a break for a bit and watched my husband catch the remaining light. I loved this one because it capture him doing one of the things he loves to do most – take pictures.

Taking a Photo of my Husband Taking a Photo

I seriously wish I could remember the name of this beach in New Zealand. It started to hail about five minutes after this shot was taken. I was really struck by the vivid colors (I didn’t touch up this photo at all!) The blue of the ocean bled into the dark gray sand which was framed by the bright green hillsides and the ominous dark storm clouds loomed behind. I learned about perspective when I took this shot.

A beach in New Zealand

Now on to other peoples’ photos. I love this shot of palapas – there’s symmetry, nice color and it’s just a very visually pleasing photo. Not the most unique out there, but just — pretty. Reminds you of what the beach is for: relaxing. Symmetry is relaxing for most people, and that’s the feeling this photo creates.

Palapas

This next shot reminds me of the architecture on a beach — it’s not just all sand dunes. The Huntington Beach pier frames the shot like twenty different picture frames, and I wonder what’s through the peep hole at the end. The ray of light on the left draws your eye up diagonally through the photo.

A nice pier shot

A cute take on a classic – the surfer. It almost looks as though the hand is putting down the sand for the surfer to walk on.

Surfer

I love, love, love beach storms. They just seem so much moodier and interesting than they do over land. Can’t you just sense the lightning in these clouds? The water seems remarkably calm for the storm brewing above it.

A storm approaches

Photos: Jenny Bengen-Albert, footloosiety, bosdos, ~ipoxstudios~, Meta-Man

Siesta Key Beach Named Best Beach in America by Dr. Beach (2011)

Siesta Beach's gorgeous water

Man, I really have to make it over to Siesta Beach in Sarasota, Florida. I’ve been wanting to go ever since I read fellow Uptake blogger Barbara Weibel’s post about it back in late 2008, but I’ve just never made the time. Friends have recently gone and told me how amazing it is; not only is the beach and water itself lovely, but there are apparently lots of things to do around the area for families such as museums and an aquarium, which sets it apart from the Rosemary Beach area, as much as I love it.

So what exactly makes Siesta Beach so lovely? According to Barbara Weibel, it’s the sand; made up of 99% quartz, it reflects most of the sunlight, keeping it cool on the hottest of days. The sand is wonderful for sand castle building as well. And, the beach is shallow, and there are lifeguards around at all times, making it very safe for everyone. Lifeguards are rarely present at the beaches I have visited recently.

The impossibly why sands on Siesta Beach in Sarasota, Florida

However, Dr. Beach pointed out something else about Siesta Beach which makes it highly attractive to me — it’s smokeless! This means no cigarette butts in the sand and no having to look at smokers on the beach — it always ruins the healthy beach vibe for me.

I was also proud to see that San Diego’s Coronado Beach made #2 this year, as it should! Such a gorgeous beach, it’s my favorite on the West Coast. Here are the details on the other beaches that made the list this year.

Putting Siesta Beach at the top of my list for beaches to visit in the very near future. Perhaps I can sneak a visit in this fall? I love the name – it means “nap” in Spanish, which pretty much sums up my favorite beach activity.

Photos: mylerdude, matthewingram

Henderson Park Inn: The Ultimate Beach Bed & Breakfast

This is a guest post written by Susan Jarvis Moody. Henderson Park Inn Helps Turtles Henderson Park Inn, an exclusive, adults only hotel and restaurant located on the Gulf of Mexico will soon allow 100 tiny turtles to take up temporary residence as they make their way to the water. One third of the word’s [...]

Jellyfish Remain in the Florida Newspaper Headlines

This has been a big year for jellyfish. It seems like every few weeks they are making headlines by “invading”some Florida beach. Well, now they’re back. In southeast Florida. Apparently they’ve heard that the weather is nice in Fort Lauderdale and Boca Raton. Moon jellies (Aurelia aurita) are hitting the beaches by the thousands. Though [...]

Bradenton Herald Sounds Alarm on Cuts to Beach Water Monitoring

The Bradenton Herald has just published an editorial chastising the state for cuts in beach water quality monitoring. Public health stands to be compromised by the state’s shortsighted decision to slash spending on the testing of water quality at dozens of beaches around Florida…Three of Manatee County’s 10 sampling stations will close–at popular beaches too. [...]