Sperm more sterile second ejaculation

Getting to grips with the numbers behind the man's part of the reproductive system. Although I'm a biologist, I rarely think much about what the cloudy white stuff contains, but in fact semen is far more complex than my endearing childhood image of mini tadpoles swimming around in thin wallpaper paste. There are many features of human semen that are very familiar to most people, but their importance isn't appreciated. For a start, the ejaculate isn't of a uniform consistency. As the man ejaculates, the first 'spurt' contains far more sperm than subsequent spurts.

Just as age weakens your muscles and changes your eyesight, it can reduce both the strength and volume of your ejaculation. Every ejaculation releases semen from your body through your penis. The process happens in two stages:. A problem in the first stage of this process can reduce the amount of semen you ejaculate. A problem with the second stage can reduce the force with which semen is expelled. Orgasm intensity varies from man to man.

Tutor A. Spermatozoa were first described by Leeuwenhoek in the 17th century but it was not until that the sperm count was found to be associated with fertility potential Since that time a variety of sperm tests and semen parameters have been developed with the hope of clarifying whether or not a man could impregnate his partner.

When you see a doctor because you're having trouble getting your partner pregnant, he or she will try to determine the underlying cause. Even if your doctor thinks low sperm count is the problem, it is recommended that your partner be evaluated to rule out potential contributing factors and determine if assisted reproductive techniques may be required. This includes examination of your genitals and asking questions about any inherited conditions, chronic health problems, illnesses, injuries or surgeries that could affect fertility. Your doctor might also ask about your sexual habits and your sexual development.