Dr. Luke Machen

AFRM team publishes study converting men maintaining fertility from clomid to Natesto.

As more men are waiting until later in life to father children, and more men are being diagnosed with low testosterone at a younger age, there is a fair amount of cross-over in these 2 groups of men.  A longstanding challenge in reproductive medicine has been treating men with low testosterone in a fertility […]

Marijuana: Good or Bad for Male Fertility?

As more and more states legalize marijuana, there has been a corresponding increase in its utilization. In fact, it’s been estimated that 16.5% of adults in the US regularly use marijuana. Understandably, this has led to increased interest in possible health benefits and risks, including its potential effects on male fertility.

There is evidence that […]

E-cigarettes may have negative effects on Sperm Counts

Billed as a healthier alternative to traditional cigarettes, the popularity of electronic cigarettes, or e-cigarettes, has increased in recent years. While e-cigarettes do contain fewer chemicals and may be beneficial in adults as a substitute for smoked tobacco products, they are far from safe.  E-cigarettes contain nicotine, heavy metals, and other volatile organic compounds, […]

The Texas Medical Association selects Dr. Luke Machen to participate in their annual leadership college

The Texas Medical Association (TMA) leadership college was established in 2010 in order to foster strong physician leadership in Texas. Each year, a small group of individuals are selected to participate based on their commitment to leadership development, and their desire to contribute both to medicine and their community. Dr. Luke Machen was recently […]

Does Coronavirus negatively affect the male reproductive tract? The evidence so far

Important questions for young couples attempting to conceive have arisen during the pandemic. One such question is, does this illness affect the male reproductive tract? While multiple studies have been performed attempting to address this question, the results have been mixed so far.

Two studies found no evidence of coronavirus in semen an average of […]

Prednisone may help men struggling to conceive after vasectomy reversal

Every year in the US, approximately 500,000 men undergo a vasectomy, and 3-6% of these men ultimately elect to have the vasectomy reversed. Fortunately, success rates for vasectomy reversal when using an operative microscope can exceed 95%. However, despite a successful operation, a small number of men can have persistently low sperm counts as […]

Study finds poor diets may negatively affect semen parameters

Studies have shown that semen quality has steadily declined since the middle of the 20th century, with one study estimating a 50-60% decrease in sperm counts since the early 1970s. The cause of this decline is unclear, but one potential culprit could be a worsening in diet and nutrition.

One such study examining this topic […]

Male Infertility: What Are the Causes?

It is estimated that approximately 15% of couples will struggle with infertility. Of those couples, up to 50-60% will have at least a contributing male factor. The causes of male infertility are diverse, and can range from anatomical issues, to genetic mutations, to hormonal insufficiencies. For example, one of the most common causes of […]

Is there a link between cell phone/WiFi use and Male Infertility?

With the near-universal use of smart phones and presence of WiFi, there has been an increased interest in research regarding unintended consequences of these technologies. One example of this is in the realm of male fertility. For example, a recent news article from the Daily Mail quoted multiple physicians and scientists in the UK […]

Most Patients See Improvement in Sperm Counts by 6 months following Varicocele Surgery

Varicoceles represent a common correctable etiology of subfertility in men, present in approximately 40% of men with primary infertility. Varicoceles may be addressed with a specialized operation that uses an operative microscope to divide the dilated veins. While it has been established that most men will have improved semen parameters following surgery for varicoceles, […]