Sorry, but if I was still with my ex, I wouldn't be the one getting sterilised next month!
I wanted HIM to have a vasectomy. He didn't want to, due to his irrational avoidance of ANYTHING medical.
Equally, I wasn't prepared to get pregnant again, and at the time, I was classed by my PCT as 'too young' to be sterilised, whereas ex was 7 years older, and wasn't.
Due to other meds, coil/mirena not effective for me, and hormonal contraception not effective AND gave me horrific side effects.
I just was NOT in the mood for sex when I was worrying about unwanted pregnancy. I told ex this (he wasn't ex then). I pointed out that due to everything, it was highly unlikely that I would feel like sex until either the NHS agreed to sterilise me, or he got a vasectomy.
He left after 4 months of abstinence. I am finally now, 15 months after he left, considered old enough (at 31, but I had to fight to be allowed, they don't like doing it for women under 34 here), to be sterilised, and my date is 2nd October.
I'll bet he tries to come back after the op. and I will tell him to fuck off. He wasn't prepared to wait until I was 'old enough' or won my fight with the NHS, he wasn't prepared to go for a day procedure that doesn't require a general anaesthetic, so like fuck am I letting the selfish cunt back!
Be warned, though, OP - abstinence, while your right as your only current method of preventing unwanted pregnancy, is unlikely to go down well or improve your relationship. You may find yourself single after a while. Which IMO is unfair.
Why the hell should it all be down to the woman? If the man isn't prepared to be sterilised after their family is complete, then IMO he has no right to get shirty when the woman won't have sex, as she is just using the one method of contraception that is 100% effective.
It's not an ultimatum, but a statement of fact, or at least it was in my case, that I was not prepared to risk pregnancy AT ALL by having sex with someone who hasn't had a vasectomy.
It's just as much the OP's right to refuse sex so as to prevent an unwanted pregnancy as it is the OP's DH's right to refuse to have a vasectomy. I would and did say the same as the OP.
As I am no longer with my ex, and have won my battle with the NHS, I will be getting sterilised in October to ensure that I won't fall pregnant again, with ANY partner.
So it could end up, OP, with you splitting up with your DH, then having to have the operation anyway if you still want to ensure that you don't want to fall pregnant.
I am studiously ignoring the 1/200 pregnancy after sterilisation rate that the Gynae Consultant told me about at the initial consultation three weeks ago...