The preceding paragraphs have defined the way in i m sorry sperm are produced. Currently look at the entire pathway a sperm should travel come fertilize one ovum.
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a. V each ejaculation, the testes release as much as 400 million sperm. The score is for one sperm cell to meet and also fertilize one ovum.
b. As soon as a masculine ejaculates, sperm space ejected indigenous the pocket of the testes through a collection of ducts (the epididymis ducts, the ductus deferens, and also the ejaculatory ducts).
c. Seminal fluid, pouring right into the ducts indigenous the prostate gland and also the bulbourethral glands, flushes the sperm v the urethra and also out the the tip of the penis.
d. Before fertilization can take place, the sperm should be deposit in the vaginal vault, pass through the tiny opened of the cervix, swim with the uterus, and also reach the fallopian tubes.
Editor’s Note: when sperm are qualified of swimming brief (microscopic) distances, this is no longer believed to be the major mechanism by which sperm reach the egg. The uterus has actually rhythmic contractions around the time the ovulation which propel sperm native the cervix up v the uterine cavity and out into the fallopian tube. The swimming action of sperm is still thought come play a role, but only in ~ the really end that the process, when the sperm space within microscopic distances of the egg.
(1) only the strongest sperm cell survive. Many sperm space destroyed immediately by the acidic fluids that cleanse the vagina. Only a couple of thousand sperm reach the cervix, and also fewer still with the fallopian tubes.
(2) Normally, the cervix is clogged by a hard wall of mucus which prevents bacteria native entering the uterus. For a few days every month (near the moment of ovulation), this special cervical mucus changes into a liquid stream the sperm can penetrate.
(3) Those sperm that pass with the cervix have about 48 hrs in which to reach and fertilize an ovum before they (the sperm) die. Sperm cells deserve to travel this distance in a few minutes.
e. The difficulty of this trip helps certain that only the most healthy and balanced sperm cells reach the fertilization point. Periodically a poor quality sperm and ovum execute unite. Most of these fertilized ova avoid developing and also are shed spontaneously. The woman losing such an ovum go not also realize the she has actually been pregnant.
NOTE: Erection of the penis and ejaculation that semen are essential for the placement the sperm in the woman reproductive tract. Semen, likewise called seminal fluid, is a mixture the sperm and also secretions from the seminal vesicle, the prostate gland, and also the bulbourethral glands.
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