I read on this site:
http://examine.com/supplements/fenugreek/#summary10-3
that fenugreek normally should not change the number of free testosterons. Also in the body builder forums they said using it for couple of months did not change anything and some reported change after taking it for a year or so.
there were too studies about fenugreek interaction with hormones:
"Interactions with Hormones
8.1. Testosterone
In rats, oral intake of 10-35mg/kg Fenugreek furostanols for 4 weeks has caused an increase in the weight of the levator ani muscle (thought to be indicative of anabolic actions in males) with no significant influence on circulating testosterone levels.[65] Prostate weight was not altered in this study.
Possible androgenic effects independent of testosterone, although no evidence exists to support the notion that this is at all a powerful androgenic effect (if it is replicated)
Fenugreek has once been shown at 500mg (brand name Testofen) to increase serum testosterone over a period of 8 weeks in resistance trained males relative to placebo (experiencing a decline in testosterone relative to baseline)[66] although another study (which noted a decrease in DHT, a testosterone metabolite) failed to find any significance influence on total or free testosterone using similar methodology[67] and a study using 600mg of Testofen for a period of 6 weeks in otherwise healthy man has similarly failed to find an increase in testosterone.[68]
In regards to DHT, the one study to measure DHT noted a 9.42% decrease relative to baseline over 8 weeks supplementation of 500mg Fenugreek.[67]"
10.2. Lactation
Fenugreek is a commonly recommended herb for increasing milk production in pregnant women,[77] and is seen by some as one of the few herbs with promising evidence.[78][79] It is told (traditionally) that fenugreek 'stimulates sweat production' and that this influences milk production as the two structures (sweat glands and milk glands) are similar.[80][81]
A few trials have been conducted on the matter, and fenugreek seems to be able to enhance milk production in recent mothers more than placebo.[80] In which control and placebo had 31.1+/-12.9mL and 38.8+/-16.3mL respectively, the fenugreek group was able to produce 73.2+/-53.5mL after consuming at least 3 cups (200mL) of fenugreek tea (Still tea, Humana) for three days.
The mechanism of action is not specifically known, but may be related to phytoesteogens or diosgenin.[80] Not many studies have detected the presence of Fenugreek bioactives in breast milk, but one assessing the anti-oxidant capacity of breast milk from mothers drinking Fenugreek tea failed to find a significant difference relative to placebo.[82]