Sorry to hear your news, but glad you’ve found the group. 3b is clearly intimidating and the treatments objectively unpleasant, but also good to know the stats are still squarely on your side.
Indeed cancer treatment can be rough on fertility. My main advice would be to freeze some sperm before treatment starts, as nothing is guaranteed. This way you can confidently pursue the treatment that confers the best outcomes for your husband, without having to trade-off against fertility concerns. I had 5 weeks of pelvic radiation and 13 cycles of chemo, I am now very lucky to be NED (after stage 4) but my sperm count is currently zero. Thankfully I have 10 sticks of sperm frozen; enough to do artificial insemination and/or IVF if we want to. The radiation is definitely the most damaging, but chemo can still have an impact. In many cases sperm counts can recover from 6-12 months after treatment too.
Best of luck with it,
Male 38; Australia
10/2018 Dx 3.5cm RC adenocarcinoma, 12cm from AV
Mod diff, EMVI+ LVI+. 4 liver mets
pT3N1aM1a; Stage IVa. MSS, NRAS (G13R)
CEA: Oct-18= 12; Nov-18= 14, Mar-19= 2.4, Aug-19 <2.0, Mar-20=2.2, May-20=1.9.
11/18 FOLFOX x6
3/19 Liver resection
5/19 25x pelvic VMAT radiation; complete metabolic response
07/19 ULAR (robot), temp ileo, 1/27 LN
08/19 Missed a liver spot
08-11/19 FOLFOX x1, FOLFOXIRI x1, FOLFIRI x5
12/19 Liver resection #2
02/20 Ileostomy reversed
03/20 PET & MRI = NED!