Hi, based on the research I have done for my prostate cancer diagnosis, I think your Urologist is giving you good advice. With a Gleason score of 3+4 and cancer that is contained to the prostate, active surveillance could be one of the options available. I don't say this to suggest this treatment option, but rather to indicate that from the information you have provided, his form of cancer is not aggressive and not likely to progress significantly in six months or likely even longer.

I am also from Canada (central Alberta). Before having a biopsy, I had a PSMA MRI, which detected a small lesion that extended outside the capsule of the prostate. A subsequent biopsy confirmed that the lesion was cancerous (Gleason 4+3) with Cribriform Pattern 4 present. I had a subsequent PSMA PET Scan that showed no indication of spread. Because my cancer had more aggressive indicators than your husbands (i.e., it extended outside of my prostate capsule, was Gleason 4+3 and had Cribriform pattern), I definitely required treatment and had a robot assisted radical prostatectomy on July 14th. My follow-up pathology showed no cancer in any of the margins of what was removed or in removed lymph nodes and seminal vesicles. This was good news and post surgery pathology is standard testing that they will do if your husband opts for surgery.

A few things to consider:
1) Check if the biopsy results mention anything about Cribriform Pattern, which is a more aggressive form. If it was not found this is a good sign.
2) If your husband had a PSMA MRI test before getting a biopsy, this provides an image of prostate and whether the cancer is confined to the prostate or may have spread to surrounding tissues. I was not sure what you meant by "Contained in both side prostate", but if you meant that the cancer is confined to the prostate this is also a good thing.
3) I did a lot of online research from reputable sites and spoke to two different urologists, but I still wasn't sure I knew enough about the treatment options to be sure that a prostatectomy was the best option for me. I decided to book private consults with a urology surgeon and a radiation oncologist at the Mayo Clinic. It cost me a few thousand dollars US, but I was able to get all of my questions answered within a couple of weeks and I am very happy I did it.
4) If your husband decides on a prostatectomy, make sure he gets a robot assisted radical prostatectomy or RARP and not an Open prostatectomy. While research may indicate that the outcomes may be similar, the recovery is much faster RARP.
5) I suggest at least checking into active surveillance as a treatment option, if only to give you comfort that your husbands cancer, based on what you posted and my understanding as a fellow patient only, is likely to progress slowly.

I empathize with you because I found the uncertainty on not being sure what to do and then not being sure when it will be done to be the hardest part.

I wish you and your husband all of the best.