Of course you’ve measured your penis to see how your member matches up, but you’ve probably never taken the steps to actually quantify how your after-sex eruptions compare to those of other dudes.īut still, it might have crossed your mind: Is the amount you’re ejaculating normal? Some of the causes of low semen volume are treatable, so don't be afraid to bring up the topic with your doctor.Low semen volume could be a sign of low testosterone or diabetes.If you're producing less than a third of a teaspoon of semen you may have underlying health problems.