Here is how varying levels of testosterone can affect sperm count: Through therapy, doctors carefully titrate the dosage that patients receive to arrive at the “sweet spot” of ideal testosterone levels. While low testosterone levels are frequently the cause of infertility in men, higher than normal testosterone levels can also make conception a challenge. How Different Testosterone Levels Affect Sperm Count This is one of the major reasons that older men who are planning for families often struggle to impregnate their partners. Without proper levels of testosterone in circulation, sperm production is severely limited. Testosterone is intricately involved in spermatogenesis from start to finish. Scientists have recently uncovered a deeper understanding of how spermatogenesis works and why it depends so heavily on testosterone. In the medical literature, “spermatogenesis” refers to the process of sperm production. Other than testosterone, the other two hormones that direct sperm production are called luteinizing hormone (LH) and follicle-stimulating hormone (FSH). Medical literature describes sperm production as “hormonally driven,” meaning that the body requires the proper signaling from testosterone, working in tandem with other hormones, to catalyze sperm production. Testosterone is produced in the male testes, the same glands in the body where sperm is manufactured. Testosterone is the primary male sex hormone, playing a crucial role in reproduction. How Testosterone Promotes Sperm Production As we’ll explore later, the two conditions often go hand-in-hand. As the numbers of sperm increase, so does the likelihood of pregnancy.Īny man who has struggled to impregnate his partner should consider being tested both for low sperm count and for low testosterone. As the graph below demonstrates, the total sperm count is closely linked to pregnancy rates. How Sperm Count Affects Fertilityīoosting sperm counts - through testosterone replacement therapy (TRT), which we’ll discuss later, as well as through lifestyle changes – is a proven strategy to increase the chances of successful fertilization of an egg and a resulting pregnancy. Again, the causes for an inability to become pregnant vary, but sperm count is a common factor. Even otherwise healthy couples with plans for children often struggle to achieve pregnancy. Low sperm count and/or low quality of sperm can be a major burden for men and their partners who hope to start a family. Low sperm counts have profound effects on a man’s personal life as well. Any fertility rate under 2 signals potential trouble on the horizon. The 2-baby threshold is called the “replacement level” by public health officials. The US, with a 1.77 fertility rate, means that women have fewer than 2 babies each – not enough to keep the population steady. At the societal level, fertility rates can be used to predict future population growth. On a macro scale, “fertility rate” is a statistical measure of how many children women have. The reasons that women have fewer pregnancies than in generations past are complex, but it is partially due to men’s low sperm count. In the United States, women have fewer babies than ever before. The falling sperm counts of men is one of the major contributing factors to the slowing rates of reproduction observed throughout advanced societies. The trend has alarmed doctors and scientists who see the long-term impacts of a society that is unable to healthily reproduce. Men in the United States, as well as men across the West from Europe to Australia, have seen a precipitous decline in sperm counts in recent decades. This chart breaks down the causes of infertility: However, in a large percentage of cases, the man is actually the cause. General physical examination and medical history.Īccording to one study, “semen abnormalities”, which are often caused by hormonal imbalances, are significant factors in 44% of cases where couples attempt to conceive but cannot due to male infertility.Īmong couples attempting to start a family, women often bear the brunt of overcoming obstacles to getting pregnant.Male fertility can be assessed with the following medical tests: The primary measures of fertility are overall sperm count and, just as importantly, the capability to move through the woman’s ovaries to reach the egg. “Fertility” refers to the ability of a man to successfully impregnate a woman through intercourse by fertilizing an egg. What Factors Affect Male Fertility and How Is It Measured in Men?
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