Essential has nothing to do with it. The NHS funds mastectomies for transmen and endless rounds of puberty blockers plus associated therapy. It funds operations for people who have got pissed and fallen down the stairs or through a window or people who have climbed a mountain or just fallen over an unexpected toy in their hallway. It funds healthcare for people who have looked after themselves and people who haven't.
If we start going down the road of essential vs non-essential, or fault or no fault, it is a slippery path where none of us are winners.
Have a genetic predisposition to eczema? Why should the NHS treat your kids? Actually, if you have cancer in the family, should the NHS fund further treatment? People are far more likely to get cancer (or heart disease) if a relative has suffered after all. If you choose to partake in cycling, particularly in London, should the NHS fund your treatment if you're injured? Actually, should it fund any sporting injuries at all, given they're all self-inflicted?
But this isn't a self-inflicted injury. WHO has deemed fertility treatment a right - if we are infertile, part of our body isn't working properly, and it is as deserving of treatment as a malfunctioning limb or any other organ. Fertility is not a blessing, it is a right as long as we have the technology to treat it.
It is a soft target to go after IVF to reduce NHS costs and women should think very carefully before they celebrate this as a positive move.