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Case Study:  Semen for testosterone replacement therapy (TRT)? Maybe, the ram seminal plasma testosterone concentration is high enough for natural TRT.
Reader: 8/16/2010>
Dear Dr. Lin,
 
Thank you for your earlier help.  I am now 47 years old and told that I have Kallmann's Syndrome.  The western protocol is 10mg of testosterone per day.  Am I able to receive that much from semen ingestion?  I prefer a natural approach if possible.
 
Thank you.  I hope your business is still doing well.
Dr. Lin: 8/16/2010> you may have to ingest couple gallons of semen!

Reader: 8/17/2010>

a couple gallons for 10mg?  (not 10 g)
 
obviously gallons is not practical, but I can obtain about 2-6ml each day.
De. Lin: 8/17/2010>
The buffalo seminal plasma testosterone concentration is about 1 ng/ml.  You need about 1 liter semen to have 1 mg testosterone.
 http://www.vef.hr/vetarhiv/papers/70-3/javed.pdf
The stallion seminal plasma testosterone concentration is 23.10 pg/ml or 0.0231 ng/ml. You need 43 little stallion semen to have 1 mg, although the stallion ejaculation volume is about 70 ml (0.07 little).
http://www.ncbi.nlm.nih.gov/pubmed/10565441
The cock seminal plasma testosterone concentrations is 1.57  ng/ml. You will need about 0.6 little cock semen to have 1 mg.
http://www.informaworld.com/smpp/content~db=all~content=a784216591
The ram seminal plasma testosterone concentrations is 28.13  ng/ml (breeding seasonal from September to December/January) or 10.66 nd/ml (non-breeding season from February to August) . You will need about 0.035 0.093 little cock semen to have 1 mg.  So, this is the most concentrated semen you can have.  No wonder, we call the old sexy men the old horny goats!
http://rbej.com/content/pdf/1477-7827-8-59.pdf 
The human seminal plasma testosterone concentration is 0.857- 1.328 ng/ml or 2.97 - 4.6 nmol/L(. You will need about 0.9 little human semen to have 1 mg.
 http://www.ncbi.nlm.nih.gov/pubmed/1030919
http://www.andrologyjournal.org/cgi/content/full/23/4/572
http://www.andrologyjournal.org/cgi/rapidpdf/jandrol.109.007609v1

PS: Average Ejaculation Volume (Ejaculation frequency dependency and age)

1. Boar - 200 ml or more
2. Stallion - 30 - 250 ml (60-80 ml, typical)
3. Dog - 1-6 ml (without prostatic fraction, thick milky white) or 7 - 15 ml (with prostatic fraction)
4. Bull -  5ml (1 - 15 ml typical)
5. Man - 3 ml (2-5 ml, typical)
6. Cock - 1 ml
7. Coyote - 1.67 ml (Jan. - March) and 0.0 ml (June- Oct.)
8. Africa Buffalo - 22.2 ml (breeding season) or 11.1 (non-breeding season)
9. Deer - 1.00 (between velvet shredding (August) and antler casting (next April) - 0.5 ml (the rest); 0.8 ml during rutting period in Oct. and Nov.
10. Jagua5 - 6.00 ml ( fall) - 11.00 ml (winter)
http://www.vivo.colostate.edu/hbooks/pathphys/reprod/semeneval/dog.html 
http://www.vivo.colostate.edu/hbooks/pathphys/reprod/semeneval/stallion.html 
http://www.art.net/~hopkins/Don/text/AILabratories.html
http://jas.fass.org/cgi/reprint/40/5/917
http://www.vivo.colostate.edu/hbooks/pathphys/reprod/semeneval/bull.html 
http://ddr.nal.usda.gov/bitstream/10113/15318/1/IND44044031.pdf 
http://pvj.com.pk/pdf-files/27_2/page%2063-66.pdf
http://www.reproduction-online.org/cgi/reprint/85/1/7.pdf
http://www.scielo.br/scielo.php?pid=S1413-95961999000500008&script=sci_arttext