testosterone affect sperm

hi guys, can testosterone or any other gear affect your sperm when trying to get your girl pregnant?
Can this directly affect the baby to be and in what ways????
Is this very dangerous......

yes, they can make you infertile while on or less fertile.
no, it will not affect the baby just sperm production and motility.

Its more likely to have a girl because of something to do with the pH or something ..

I found out a month ago that my wife is pregnant...I was on Test and 100mg of Anavar...So that answers your question.

No it has nothing to do with the baby. It can reduce your sperm count but in no way should you believe that you're sterile just because you're on AS.

testosterone is actually fairly effective as birth control for ASIAN men (though again AI, SERM, etc- negates this effect). up to 97% effective in all populations after 12 months of continuous use.

white males reach suppression faster (typically about 2-3 months), but its more thorough in asian men 99%

studies generally used 200mg enanthate per week



HOWEVER- again if you use an AI, SERM, HCG or even some dopaminergics you are very likely to be fertile (perhaps still with a low sperm count- depending on a host of factors, but still fertile)

WHO studies

Int J Androl. 1995 Jun;18(3):157-65. Links
Rates of testosterone-induced suppression to severe oligozoospermia or azoospermia in two multinational clinical studies. World Health Organization Task force on Methods for The Regulations of Male Fertility.[No authors listed]
Two multicentre studies of the contraceptive efficacy of azoospermia and severe oligozoospermia were conducted in 16 centres in 10 countries. They used a common protocol of weekly testosterone injections for sperm suppression, the patterns and degrees of which were compared among men from different population groups. Six hundred and seventy normal, health volunteers, of whom 205 were Asian (mostly Chinese) and 465 of non-Asian origin, were given weekly injections of testosterone enanthate, 200 mg IM, during the suppression (6-month) and efficacy (12-month) phases. Patterns of sperm suppression were assessed by semen analysis at monthly or 2-weekly intervals. Sperm counts suppressed more slowly in the Asian than in the non-Asian men in the first 2 months of injections but subsequently suppressed to lower sperm concentrations below 5 million/ml, 3 million/ml or azoospermia at 6 months were 97.1% 95.6%, and 66.7%, respectively for non-Asian men, compared to 99.4%, 98.4% and 89.2%, respectively for Asian men. In conclusion, a hormonal contraceptive method based on regular testosterone injections can suppress spermatogenesis to azoospermia or severe oligozoospermia in 97% of men, regardless of their ethnic origin.


azoospermia is really required for "complete" protection so a more legitimate effectiveness rating is apprx 67% for white males and about 90% in asian males.


oligospermia greatly reduces fertility studies have found with 5mil or less/ml a less than 20% fertility rate, with actively trying to achieve pregnancy. Below 1million the rate drops to 1-2%.

All the men I know, including myself, who have been on for 2 or more years and inpregnated their wives/gf's were not Asian. I never thought about that until now. One guy I know in San Diego has been on since 1986 and has 4 kids. All after being on 7 years or more. Just to clarify, suppression does not mean sterile. It only means instead of, for example 150 million/ml you'll only let go 10-15 million. Anything below 20 million is considered low. But certainly 10 million would do the trick.

note- since most people use AI's and SERMS and/or dont cycle for more than 2-3 months, you should not consider AAS as a form of birth control other than a "reduces the risk of pregnancy" type of birth control.

Ulter said:

All the men I know, including myself, who have been on for 2 or more years and inpregnated their wives/gf's were not Asian. I never thought about that until now. One guy I know in San Diego has been on since 1986 and has 4 kids. All after being on 7 years or more. Just to clarify, suppression does not mean sterile. It only means instead of, for example 150 million/ml you'll only let go 10-15 million. Anything below 20 million is considered low. But certainly 10 million would do the trick.

Click to expand...

you will likely find that in most cases, SERMS or AI's were involved. keeping mind the super long half lives of the SERMS and the fact that you again have to suppress that production. Though without at progestin only about 70% of white men are azoospermic, so while its harder to get someone pregnant while on test alone its still quite possible, keeping in mind that short cycles pretty much do not make one azoospermic (at least 2-3 months on, generally 6 months) and again even then only 70% are azoospermic.