I found an interesting read on semen, the use of AAS can be passed on at a small amount through the process of ejaculation process, since (semen) it's made of alot natural occuring substances in the body.... the following read should be helpful to read.
Around 200 million to 500 million spermatozoa (or 'sperm', for short), produced in the testes, are released per ejaculation. However, they make up only about 2–5% of the volume of semen. The bulk of the seminal plasma, the fluid portion of semen, is contributed by the male accessory organs of reproduction. Some 60% of semen is produced by the seminal vesicles, and most of the remainder is generated by the prostate. Prostatic secretions in humans contain high levels of citric acid, acid phosphatase and zinc. A small amount of viscous mucus comes from the bulbourethral glands. Overall, the seminal plasma contains a very complex range of organic and inorganic constituents. These include metal ions, sugars, lipids, steroid hormones, prostaglandins, amino acids and nitrogenous bases. Strongly basic (cationic or positively charged) amines such as putrescine, spermine, spermidine and cadaverine are responsible for the smell in semen. However, an offensive and putrid smell indicates a urinary tract or other urogenital infection. The cationic bases counteract the acidic nature of vaginal secretion, and also buffer the DNA inside the sperm.
Fructose is the main energy source of sperm cells. Some of the other components of semen serve to increase the mobility of sperm cells. Sperm function best in a slightly alkaline environment, whereas the vagina is usually slightly acidic. The fluid excreted by the seminal vesicles is alkaline. Prostaglandins are unsaturated fatty acids used for hormonal actions.
A typical ejaculation can contain up to 5 mg of zinc. Men that ejaculate frequently might become deficient in zinc. Zinc deficiency can also cause reproductive problems and problems with spermatogenesis.