Fertility treatment - and indeed the whole experience of TTC - is something you do together (setting aside anyone who's single and going through this without a partner). It takes two people to make a baby, and this is as true when it comes to assisted conception as it is with having some sex.
Fertility treatment isn't something I do - it's something we do together. Yes, it's me that's physically turning myself into a human chemistry set and being prodded and poked, but we're experiencing this as a couple. DH doesn't come to all my appointments (we've been doing fertility treatment since August 2015, and I'm in for scans at least once or twice a month, sometimes every other day when I've been doing a fresh cycle) but he's there for most of them, and certainly the big consultations. He might not be on infertility forums like I am, but I know he spends a lot of time on Google, and asks the Dr lots of questions in our consults. He mixes my drugs and I inject.
We make decision together. We're facing the end of the road as it's unlikely my body is going to be able to sustain a pregnancy, and we have to decide when to call it a day with my body, and consider moving on to surrogacy. We have a LOT of heart to heart conversations about what we're going through, and whenever we get bad news (whether that's a disappointing blood test result or scan, or the bigger stuff like our miscarriages) he is heartbroken.
It is the hardest thing we have ever done, and it really really does take a toll. It puts tremendous strain on your relationship. And we haven't always been aligned. We had fundamental disagreements about certain things - it's taken a lot of negotiation and understanding to get through these. But for us, we've remarked that the adage of 'what doesn't kill you makes you stronger' has been very true. We feel more of a team than ever, and wherever we end up, we're walking this path together.