The impact of Essendon's supplements program on the players' fertility has come under question as a result of the joint inquiry being run by the AFL and ASADA.

Past and present Essendon players were stunned at the line of questioning, which left them concerned their fertility and the health of their unborn children could have been affected as a result of last year's irregular practices at the club.

Past and present Essendon players were stunned at the line of questioning, which left them concerned their fertility and the health of their unborn children could have been affected as a result of last year's irregular practices at the club. Credit:Pat Scala

Several players, including former Bomber Mark McVeigh, were asked whether they were aware of any potential side effects to their health of the program in which a significant number of players were injected twice a week and also placed on intravenous drips as part of the club's edgy attempt to fast-track on-field success.

AFL Players Association chief Matt Finnis refused to comment on specifics of the joint investigation, which will soon be completed, but said: ''I'm not surprised that players have been angry and concerned. I'm aware of the interviews and I've had my representatives and my lawyers at the meetings.