There is a clear correlation, and moreover there's been many, many social science studies of IVF patients that back this up, that the adoption rate in the UK fell almost to zero at the same time as IVF became available on the NHS.
Once you had the option to have the NHS give you a baby for free, no one wanted a second hand one, even fresh out of the womb. Even the occasional dark paper that still surfaces looking at rates of infertility, birth defects, and other long term health issues in kids conceived by IVF receives no traction.
The UK has one of the lowest adoption rates of any first world nation. No one wants these kids. Even the infants: no one wants them. There was a stretch of three years recently when not a single child with disabilities in the whole of England and Wales was adopted.
The social impact of fertility treatment becoming widely available is rarely if ever discussed in the media, but it has been absolutely profound in the UK. In the space of a generation, adoption has more or less ceased to exist.