Totally agree with GD. You need a proper diagnosis first and foremost. The cause of your husbands low T could very well be correctable. Right now you are putting a bandaid on the problem which ultimately may mask the underlying issue. That is a very low T level which IMHO seems to go beyond an age related issue. That opinion comes from experience as I was down to a 59 level.

Please seek a proper medical diagnosis! Then have that kid!