GagaJo
Although probably not in the OP posters case, a lot of IVF treatment (mostly privately funded I think) is for age related infertility.
Womens bodies are made to reproduce in their 20s and 30s. If it's left until late 30s/40s, it's possible to miss the boat.
Just to add that my daughter got married at 28, had her first miscarriage at 28, and then suffered infertility because she couldn’t conceive. Her IVF treatment was during her very early thirties. It was nothing to do with her or her age, it was to do with her husband who carried a chromosomal defect that prevents conception. Her embryos had to be sent from London to Oxford where one cell was carefully removed to ascertain whether they were affected by the condition, not as a carrier but as a sufferer. Twelve out of sixteen embryos suffered and were destroyed. The remaining four good embryos were returned to London where two were implanted successfully and resulted in our twin grandchildren. The NHS wouldn’t look for this until she had three miscarriages but she couldn’t have three miscarriages because the condition prevents conception. There was no alternative but to pay an extraordinary amount to attend the ARGC in London, one of the best IVF clinics in the country.