Want to get my wife pregnant but am on finasteride

Finasteride is not reported to come across in the sperm; however, if you are wanting to be extra-sure and you are planning on pregnancy, since finasteride has a half life of only 6 hours in the blood stream, you can assume that within a day or two after taking it, it will not be in your semen. To take advantage of this, you can stop finasteride mid-cycle, starting it on the day of her period for 10 days, stopping it for 10 days and the restarting it again. Women ovulate mid-cycle at about 15 days post period. The finasteride stays in the hair follicle for at least 7 days, probably more so stopping the medication should not be in the blood stream or semen at day 10-20 following the start of her period.