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Higher Rate for Conception Occurs During the Winter Months


Ever wonder why it seems like so many babies are born during the later summer and fall season? It’s no coincidence. Studies show that September is an incredibly popular month for birth, which means December holds a high number of conceptions.

With temperatures dropping, people bundling up in layers of clothes and hosting chaotic holiday season schedules, why are most babies conceived during the Winter?

Increased Indoor Activities  

In winter months, when the sun sets earlier in the day and the nights get colder, couples tend to stay indoors and cuddle up. In addition, the holidays often bring people together, cause people to be cheery and – there’s always a prevalence of alcohol at holiday parties and gatherings. Although this is likely more a coincidental cause than a scientific one, it puts couples at a higher likelihood of engaging in acts that lead to conception.

Studies Show Sperm Health is High in Winter

Not only is the winter season the perfect time to cuddle up and when people seem the happiest and most fulfilled when spreading cheer, studies also show that male sperm is often the healthiest in Winter and early Spring, which leads to higher rates of conception during these months, specifically December.

According to a study published in the American Journal of Obstetrics and Gynecology, the quality of male sperm produced in the winter time is better than sperm produced in the summer months. Researchers found that sperm concentration and percentage of fast motility decrease in the spring, summer, and fall and rebound in the winter and early spring. Sperm cells also have a healthier physical structure in these months.

Additionally, a woman’s ovum receptivity due to changes in daylight length provides better conditions for fertility. Together, these increase the chances of conception.

Have Fewer Surprises this Holiday Season  

Sperm certainly isn’t suffering from winter blues. The higher likelihood of healthy sperm and coincidental circumstance often leads to more conceptions around the holidays and during the winter season. However, there is a way to have fewer surprises this holiday season: finally getting that vasectomy you’ve been putting off.

At Austin Vasectomy, we offer The Mistry Vasectomy, which does not involve a needle, scalpel, or metal clips and instead, offers a single incision and IV sedation. The specific steps have been carefully thought out to maximize the effectiveness of the procedure while minimizing pain and complications.

Ready to schedule your appointment or need to contact us for more information?

Can Cycling Affect Male Fertility?

A special class of Dr. Mistry’s patients is long-distance bicycle riders. There’s a distinct difference between wearing boxers or briefs a few hours a day and going on a 110-mile bike ride with shorts that are so tight they leave nothing to the imagination.

People will often ask, how does long-distance bicycle riding affect fertility? Cycling can affect men’s fertility in several ways, including:

  1. The rigors of training can take important bodily resources away from the reproductive tract. No one ever said cycling is easy! Training is often rigorous and puts a lot on the body.


  1. As we all know, we can’t just jump up and decide one day to go on a 100-mile bike ride. Well, we could, but we probably wouldn’t get very far without months of training and preparation. Cyclists know this well and often have to train their bodies to withstand long distances and to train their bodies to go periods of heavy activity without a lot of water. This constant cycle of dehydration and heavy training can also have an impact on sperm function, as well as testicular function and testosterone metabolism.


  1. We’ve all seen the cycling shorts or body suit that cyclists usually wear when going on a long ride and it can actually impact sperm and fertility. How? The use of tight shorts can increase testicular temperature, which can affect how the sperm move and how effectively they are produced.


People who ride bicycles long-distance often will develop a condition called pudendal neuropathy – also known as pudendal neuralgia – in which the nerves that provide feeling to the penis can be impacted. It’s known by many cyclists as a “numb penis” when they get off the bicycle after a long-distance bicycle ride. This can impact their ability to get and maintain an erection, which can also affect fertility.

Concerned about how long-distance cycling or any other sport might have an impact on your fertility? Book an appointment with us today. 

Why Choose the NAU Urology Family of Clinics for Your Vasectomy Procedure?

Any procedure, whether simple or complex is an important decision. Making the decision to undergo a vasectomy causes you to look at important factors such as cost, the procedure and ultimately, choosing a provider you can trust.

Why choose NAU Urology family for your vasectomy? When you’re choosing to undergo a procedure such as a vasectomy, you want to feel confident and knowledgeable with the provider you choose. The doctors and staff at NAU Urology have worked hard over the last 10 years to make your vasectomy the best possible experience.

In this, we’ve asked ourselves: What are the services we’d like to have for this procedure? Convenience, comfort, and knowledge are some of the biggest factors when considering a vasectomy and the provider to perform the procedure.

The ability to offer IV sedation in our office makes it possible to provide a consultation and the procedure in the same visit. Many men might be concerned regarding post-vasectomy procedure complications, such as pain or auto-reversal. We’ve taken this important concern into consideration and modified the vasectomy procedure to minimize complications, minimize the possibility of pain afterward, and still maximize the effectiveness of the procedure.

We refer to this as the Mistry Vasectomy. What sets the Mistry Vasectomy apart from every other procedure and provider? In the Mistry Vasectomy, the specific steps performed by Dr. Mistry have been carefully thought out to maximize the effectiveness of the procedure while minimizing pain and complications. Dr. Mistry does not perform the “open-ended vasectomy” where one of the ends of the vas deferens is left untied. The benefit of the open-ended vasectomy in reducing post-procedure pain is unconvincing and the increased rate of sperm granuloma formation causes unnecessary patient distress.

Instead, we’re able to perform the procedure with one incision, usually made underneath the penis, at the very top part of the scrotum. This is in distinction to most offices, which have to perform two incisions, thus doubling the risk of infections or complications relating to the incision. Dr. Mistry also does not use metal clips, because he believes metal clips can bind up nerves and potentially cause post-operative complications such as pain, which can remain for months after the procedure is complete. In addition, all of the stitches used dissolve on their own, minimizing the risk of having to return to the office for stitch removal.

All of the semen analyses performed after a vasectomy are complimentary, which we read ourselves. This allows our patients to avoid unnecessary travel to a lab during prime time Austin traffic to deliver a semen analysis – or what most people do – which is avoiding the process altogether, thus not truly knowing whether the vasectomy truly worked.

Have questions? Ready to schedule your vasectomy? Contact us today to book your appointment!

How Can MFCOA Help Improve Male Fertility?

How can Men’s Fertility Center of Austin, part of the NAU Urology Specialists family of providers, help improve men’s fertility through a holistic approach?

A holistic approach to health means treating the “whole” you, not simply narrowing in one area. At Men’s Fertility Center of Austin, we believe in treating the “whole” you to reach optimal health and wellness. This approach can have a positive impact on many areas of your health, including male fertility.

Our comprehensive approach to male health and male fertility focuses on your complete wellness and health, not just one or two areas. Sperm count can often reflect an individual’s overall health, therefore, if an individual has a low sperm count, it could point to health-related issues and vice versa. It shouldn’t come as a surprise to learn that health issues such as high blood pressure, high cholesterol, diabetes, and obesity can significantly impact an individual’s fertility potential.

Simply having an abnormal semen analysis is a risk factor for a man to develop cardiovascular disease early in his life. Elevated cholesterol, hypertension, and regulation of blood glucose all can impact fertility. Early identification of these problems, can impact both a man’s fertility as well as help him live longer.

When our providers at Men’s Fertility Center of Austin assess a man’s fertility, we like to use the opportunity to make their whole health better. That’s why at our office, in addition to semen analysis and hormone panels, we will also be doing an intense investigation of your metabolic parameters that can affect your overall health.

What does this include? An evaluation of your blood sugar levels, your thyroid levels, your lipid levels, and your blood pressure. We also make sure that you’re within your ideal body mass index. If you’re leveling out of the ideal range for your health, we have health coaches on staff that can help guide your diet and supplement menu to make you as healthy as you can be. Being the healthiest you can be will positively impact your sperm count.

All patients will have a traditional semen analysis to assess their fertility. This is the most basic test and remains one of the single most important tests to assess male fertility.

Our approach to an individual’s fertility evaluation will focus on four aspects: Genetic, Hormonal, Lifestyle, and Physiology. Our services include genetic fertility testing, hormonal fertility testing, lifestyle fertility evaluation, and physiologic fertility evaluation.

Visit our website or contact our office to schedule your initial consultation today.

How Much Does a Vasectomy Cost?

Because a vasectomy is technically a medical procedure, it’s easy to let your imagination wander when thinking about cost. Before you think it’s not affordable for you and your family, we’re here to help explain exactly what a vasectomy cost.

Many people wonder how much a vasectomy will cost for their family. Vasectomies performed by NAU Urology Specialists are done in an outpatient setting within our office, which is considerably less expensive than your wife would pay for oral contraceptives or a bilateral tubal ligation (also the same as getting your tubes tied), which is a sterilization procedure performed by an OBGYN.

You may be thinking to yourself: how could a vasectomy be less expensive than oral contraceptives? Well, when you weigh the up-front cost of a vasectomy versus paying a monthly fee long-term, plus the cost of an annual exam, a vasectomy is more cost-effective in the long-run.

So, how much does a vasectomy cost? When you call to schedule an appointment, we take the time to learn about your insurance and try to educate you on what the cost of the procedure would be. Most men are surprised to learn that their health insurance covers most aspects of the procedure – including the consultation. However, if you do not have health insurance to cover these costs, a vasectomy consultation and procedure including IV sedation and the post-vasectomy semen-analysis costs approximately $800. On top of that, you can usually expect to pay about $25 for a jockstrap and as much as you need to spend on frozen peas.

Knowing this information makes it easier to understand the cost of a vasectomy procedure and if you have health insurance, you may learn that most of this cost will be covered. Sorry guys, but you can’t use cost as a factor in putting a vasectomy off any longer now that you know this information!

What do I do before my vasectomy?

At NAU Urology Specialists, you can experience the Mistry Vasectomy difference, which means no needle, no scalpel, and no metal clips. Dr. Mistry does not perform an “open-ended” vasectomy, where one of the ends of the vas deferens is left untied. Instead, the procedure just involves a single incision and IV sedation. The specific steps performed by Dr. Mistry have been carefully thought out to maximize the effectiveness of the procedure and minimize pain and complications. Learn more about the Mistry Vasectomy here.

Ready to move forward with a vasectomy consultation and procedure? Contact us to schedule your appointment or if you need additional questions answered.

What Can I Expect After a Vasectomy?

Most of you want to know what to expect after your vasectomy. Many of you may have heard horror stories. We can tell you that with thousands of patients, experience, and personal experience, that you will be sore for a couple days.

Depending on how active you are, your testicles and groin may be sore longer. That’s why Dr. Mistry encourages you to sit still, watch television, limit your physical activity and…avoid being hit in the testicles.

You don’t want to have a full schedule of important things to do right after your vasectomy. This means – don’t go to a wedding, don’t go horseback riding, and don’t do any tractor work. Just plan on sitting at home. Ice packs will be your friend, frozen peas are the quintessential cool down for the scrotum after a vasectomy and you’ll be leaving our office with some gel packs to help with the recovery.

At the time of your procedure, you’ll be given a prescription for pain medication – depending on what you can tolerate and what we decide is appropriate for you. The medication is designed to take the edge off, but really, what’s going to help is icing the scrotum and limiting your physical activity.

Fellas, one of the problems with having your vasectomy procedure with Dr. Mistry is how comfortable it’s going to be for you. Yes, we said comfortable. Have you heard about Dr. Mistry’s vasectomy procedure? So, you’re going to have to play it up a little bit – maybe walk out bow-legged (although you won’t be) just to make it really seem like you went through quite an ordeal or else you won’t get the sympathy that you rightly deserve for having undergone a vasectomy.

So, use your vasectomy for two or three days to sit on the couch, enjoy some football and have some time to yourself. You deserve it.

You’re also going to leave our office with Dr. Mistry’s cell phone number. Whether it’s on Sunday night or the middle of Wednesday afternoon clinic, he’ll be happy to answer your call and make sure that you’re at ease.

Ready to schedule your vasectomy? Book your initial consultation with North Austin Urology today!

What Is a Vasectomy Procedure Like?

A vasectomy is a procedure, performed on a man by a urologist in a urologist’s office. When coming into our office, located at North Austin Urology, most men have an idea of what a vasectomy entails, but do not always know specifically what happens during the procedure.

A vasectomy is considered a permanent form of sterilization, although the testicles are still making sperm. Because of this, if you chose to reverse it, that would still be possible.

A vasectomy will not affect sexuality

A Vasectomy is designed to make a man sterile. Many men are concerned with whether a vasectomy will affect parts of their sexuality, which is a very important part of your body! More specifically, many men question whether or not a vasectomy will affect erections and sex drive.

Our answer is no, it shouldn’t! There is nothing about the procedure that will affect the ability to get an erection or that will affect sexual pleasure. It will not even change how your semen looks coming out of your body.

The procedure is done in-office and lasts 20 minutes

A single incision is made in the scrotum, where we find the tubes that transport the sperm. We remove a section out of the middle, tie the ends, and then hide them from each other. Despite still being able to ejaculate, under a microscope however, the semen will not show any sperm. It is important to note that you are still capable of getting your partner pregnant until all sperm ejaculated from the vas deferens.

Recovering from your vasectomy

When you go home, a simple 48-hour rest will usually have you right back to normal. We do recommend taking at least one day before resuming any activity that is rigorous or requires prolonged squatting or standing. For more information on vasectomy recovery, click here.

If you have any additional questions about what a Vasectomy procedure entails, you can contact our office.

What Do I Do Before My Vasectomy?

Vasectomy Preparation

At our office, located at North Austin Urology, most people who come in for a vasectomy consultation have the consultation and their procedure done on the same day. So, in our case, it is important to be prepared for the procedure when you come in for the consultation.

Avoid blood thinners prior to your vasectomy

The most important thing you can do is to avoid blood thinners, including aspirin, ibuprofen and other medicines which can thin the blood and increase your risk of bleeding. We ask that you avoid these medications for at least seven days prior to your procedure. This includes the use of Plavix or other blood thinners for atrial fibrillation if prescribed by your doctor.

Shaving before your vasectomy

The purpose of shaving the scrotum is to avoid hair that could be caught up in the incision and make it easier for us. Soaping up the scrotum well and then shaving the area underneath the penis on either side of the scrotum is going to go a long way to making the experience the best that it can be. If you fail to shave yourself, then I’ll be forced to do it.

Mental preparedness is an important part of your vasectomy prep

Beyond physical preparation, there might be a little mental preparation. After all, this is a pretty important part of your body, that you’ve spent a long time keeping knives and sharp instruments away from. I would say that the most important thing you can do is to make sure is to make sure that you and your partner have discussed this procedure thoroughly and are comfortable with proceeding.

In our office, some patients will have the procedure done even if they don’t have children. But, most have had children and are prepared for this next stage of life. If you have any questions about that, you may want to call our office and inquire about sperm preservation, which can be done, thus avoiding the need for a vasectomy reversal or other procedure in the future.

If you are ready to move forward with a vasectomy consultation, or have additional questions, you can contact our office and schedule an appointment.

Dr. Christopher Yang Talks Prostate Cancer on The Bro Show Pt. 1

Dr. Chris Yang of NAU Urology Specialists was recently a guest on the Bro Show. He joined The Daniels Brothers to discuss prostate cancer. Addressing the greatly misunderstood role of androgen deprivation therapy via chemical or surgical castration de-mystified by Dr. Yang.

One of the things that they quickly discovered is that Dr. Yang has a five-star rating on Yelp with glowing reviews. Taking us from his beginnings in software, they walk us through when he decided to tackle his medical degree. Dr. Yang did specialty training in sexual dysfunction. Read on for an overview of their discussion below or click here to listen to the podcast.

Let’s talk prostate cancer

The discussion is about prostate cancer. About 2.9 million men have prostate cancer, every year, about 160,000 men find out they have the disease. It is one of the most successfully treated cancers, due to early detection. With any of the cancers discussed, the issues can lie in the side effects of the treatment.

What inspired you to pursue urology as opposed to other medicine?

I knew I wanted to do something surgical and there were a couple of urologists in Galveston who were excited about the field and they got me excited about the field. Plus, urologists have the best jokes out of all physicians. With what we deal with, you have to have a decent sense of humor.

What percentage of your practice is prostate cancer-related? 

Probably about five to ten percent.

What comprises the remainder of the issues for the patients you see?

The remainder are other urologic cancers; kidney, bladder, testicular. Kidney stones and other surgical problems with the kidneys. Men’s health, fertility health and other issues such as scrotal pain.

As physicians, we get focused on our system. When I have patients that come in who have pain on their side with a kidney stone, that is what I know best.

For the layman, what is prostate cancer? 

You first have to answer what a prostate is. The prostate is an organ that sits below your bladder of men. It’s an organ of reproduction, so it makes some of the seminal fluid. Your urethra runs through the prostate. The prostate is a gland that men have that makes fluid. Prostate cancer is abnormal growth of glands. There are very rare types of prostate cancer that comes from the connective tissue, or the muscle in the prostate. Cancer is abnormal cell growth. Cells that should die aren’t and they grow and spread.

Are they tumors? 

Yeah, exactly. Cancers are tumors, but not all tumors are cancers. If you have a benign tumor, that’s not cancer.

With other cancers, people talk about stages. Is that the case for prostate cancer? 

Yes, it is. Stage 1 & 2 cancers mean that the cancer is just inside of the prostate. Stage 2 is more aggressive than Stage 1. Stage 3 means that cancer has spread beyond the prostate, but locally. It’s invaded the boundary of the prostate, the bladder or other nearby organs. Stage 4 means it’s metastatic, meaning it has spread somewhere distant to the prostate like the bones or the lungs.

So, if I have a tumor in the lymph system near my prostate, would that be Stage 3 cancer?

That would still be Stage 4.

In terms of success rate, this is distinct from other cancers, but how else is it different from other cancers? 

The thing that distinguishes it, and the main thing that we can test for is PSA. PSA stands for Prostate Specific Antigen. It’s a protein that’s made by prostate cancer cells and normal prostate cells. It’s a protein in your bloodstream at all times. If it’s high, it’s suspicious.

Prostate cancer is a slower developing cancer, which can vary treatment based on the age of the cancer patient. Can you talk about that?

You’re right. The majority of prostate cancers are Stage 1 and Stage 2 and those are very slow growing. Meaning, it probably wouldn’t cause a problem in 10 years. Stage 3 and Stage 4 cancers do have the ability to cause other health problems fairly quickly.  Right now there’s no easy way to distinguish between those two.

A very high PSA wouldn’t guarantee that I was Stage 3 or 4? 

Not necessarily. It would be more likely that you would have Stage 3 or 4.

When you’re a guy over 50 you start hearing about PSA numbers. What’s the scale and how is the number so widely varied? 

What is considered the normal range is <4 nanograms per liter in the blood. But there’s a pretty big variation as far as what’s normal. For men who have BPH, which is a non-cancerous enlargement of the prostate, which all men get as we get older, that normal range increases. Just because your PSA is 5 or 6, doesn’t mean you have prostate cancer, but we might get a little suspicious.

My urologist said my prostate size was age-appropriate.

What that means is that when you’re younger your prostate is about 20 or 30 grams, like a walnut. As you get older, with 60 year old, I would expect a prostate to be maybe 40 to 50 grams. It can get much larger, some people can get up to 100 gram or 200 gram with a softball or baseball sized prostate. You don’t really feel the size of the prostate, but it will start to restrict the flow of urine. You can’t feel it externally, but can with a prostate exam. We still only get about half the prostate.

This is a 2-part series to be continued. Check back for the next installment in March or click here to listen to the full podcast now.