IVI SANTANDER, year by year
Everything the Spanish National Activity Registry publishes about IVI SANTANDER between 2015 and 2023: 9 years with data. Each year carries its own attribution, because each year is a separate publication of the registry.
Results, year by year
Each band is the interval the registry published that year: the floor and the ceiling of the estimate, not a point. There is no line joining the years, and that is deliberate — joining the centres of successive intervals would assert a trend the data does not support.
See this chart’s data
| Year | Under 35 |
|---|---|
| 2015 | 0 – 46.5% |
| 2016 | 0 – 28.6% |
| 2017 | 0 – 44.8% |
| 2021 | 0 – 55.1% |
| 2022 | 0.5 – 49.5% |
See this chart’s data
| Year | Between 35 and 39 |
|---|---|
| 2015 | 0 – 32.2% |
| 2017 | 0 – 20.6% |
| 2018 | 0 – 37.9% |
| 2019 | 0 – 40.2% |
| 2020 | 0 – 24% |
| 2021 | 0 – 17.1% |
| 2022 | 0 – 62% |
| 2023 | 7.8 – 51.1% |
See this chart’s data
| Year | Under 35 |
|---|---|
| 2015 | 0 – 41% |
| 2016 | 0 – 46.5% |
| 2017 | 7.9 – 64.8% |
| 2019 | 0 – 32.6% |
| 2021 | 0 – 71.1% |
| 2022 | 0 – 40.2% |
| 2023 | 0 – 49.4% |
See this chart’s data
| Year | Between 35 and 39 |
|---|---|
| 2015 | 0 – 25.6% |
| 2016 | 0 – 28.6% |
| 2017 | 0 – 35% |
| 2018 | 0 – 37.8% |
| 2019 | 1 – 53.6% |
| 2021 | 0 – 16.1% |
| 2022 | 0 – 28.7% |
| 2023 | 0 – 49.4% |
Year-by-year table
The table is the exact and complete reading: everything in the charts, and more. Each row cites the wording the registry requires for that year.
| Year | Name in the registry | Pregnancy per cycle (insemination) | Attribution |
|---|---|---|---|
| 2015 | IVI Santander | 0 – 46.5% | Registro Nacional de Actividad 2015-Registro SEF |
| 2016 | IVI Santander | 0 – 28.6% | Registro Nacional de Actividad 2016-Registro SEF |
| 2017 | IVI SANTANDER | 0 – 44.8% | Registro Nacional de Actividad 2017-Registro SEF |
| 2018 | IVI SANTANDER | 0 – 37.9% | Registro Nacional de Actividad 2018-Registro SEF |
| 2019 | IVI SANTANDER | 0 – 40.2% | Registro Nacional de Actividad 2019-Registro SEF |
| 2020 | IVI SANTANDER | 0 – 24% | Registro Nacional de Actividad 2020-Registro SEF |
| 2021 | IVI SANTANDER | 0 – 55.1% | Registro Nacional de Actividad 2021-Registro SEF |
| 2022 | IVI SANTANDER | 0.5 – 49.5% | Registro Nacional de Actividad 2022-Registro SEF |
| 2023 | IVI SANTANDER | 7.8 – 51.1% | Registro Nacional de Actividad 2023-Registro SEF |
Gaps in the series, and how to read them
The registry’s province-by-province census returns empty for 2009 and 2010, even though the individual profiles for those years do exist and have been recovered one by one. A centre missing from a given year means the registry publishes no profile for it that year — not that it closed.
The registry’s template changed schema in 2014 and again in 2015: up to 2013, cycles, implantation and transfers are published without separating fresh from frozen embryos, and insemination is published for a single age band (“under 40”). That is why some years carry fewer series than others: it is what the source published, not a missing figure.
And most important: a change from one year to the next is not, on its own, an improvement or a decline. The patient mix changes, selection criteria change and, at small volumes, chance changes too. Wide intervals are precisely the signal that the exact number cannot be trusted.
Official guide: how to interpret a centre’s data (PDF, in Spanish)
← Back to the IVI SANTANDER profile
Source: “Registro Nacional de Actividad 2023-Registro SEF” (Spanish National ART Activity Registry) — registrosef.com, retrieved 31 July 2026.