From the Guidelines
The average volume of a semen ejaculation is approximately 1.4 mL, as indicated by the most recent guidelines from the American Urological Association and the American Society for Reproductive Medicine 1.
Semen Volume Guidelines
The guidelines provide a one-sided lower reference limit for semen volume, which is 1.4 mL (with a 95% confidence interval of 1.3-1.5 mL) 1. This value is based on an analysis of semen samples from 3589 males from 12 countries and 5 continents.
Key Points to Consider
- The semen volume can vary depending on several factors, including the individual's overall health and fertility status.
- A low semen volume, typically defined as less than 1.4 mL, may be indicative of distal male genital tract obstruction or other underlying health issues 1.
- It is essential to consult with a healthcare provider if you have concerns about your reproductive health or semen volume, as they can provide personalized advice and guidance.
Relevant Guidelines and Recommendations
The American Urological Association and the American Society for Reproductive Medicine provide guidelines and recommendations for the evaluation and treatment of male infertility, including the assessment of semen volume and other semen parameters 1. These guidelines emphasize the importance of a comprehensive evaluation and individualized treatment approach to address underlying health issues and improve fertility outcomes.
From the Research
Semen Volume
- The average volume of a semen ejaculation can vary, with studies reporting different values:
- A study published in 2004 found that the mean semen volume for older men (52-79 years old) was 1.8 ml, while for younger men (< 52 years old) it was 3.2 ml 2
- A study published in 2011 reported a mean semen volume of 2.0 ml for the first ejaculate and 1.5 ml for the second ejaculate, with an interval of 26-183 minutes between the two ejaculations 3
- Another study published in 2011 found a mean semen volume of 3.46 ml using a combined method for weighing human semen volume 4
- Factors such as age, diabetes, and neuropathy can affect semen volume, with some studies suggesting that certain treatments, like sildenafil, can increase semen volume in diabetic neuropathic patients 5
- Semen volume can also be affected by the method of measurement, with electronic balance weighing and volumetric cylinder measuring giving different results compared to a combined measuring method 4
Factors Affecting Semen Volume
- Age: older men tend to have lower semen volume than younger men 2
- Diabetes: diabetic neuropathic patients may have increased semen volume with sildenafil treatment 5
- Neuropathy: can affect semen volume, with sildenafil treatment potentially improving testicular function and increasing semen volume 5
- Method of measurement: different methods can give varying results, with a combined measuring method potentially providing a more accurate measurement of semen volume 4