H. Villarreal, year by year
Everything the Spanish National Activity Registry publishes about H. Villarreal between 2020 and 2023: 4 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 |
|---|---|
| 2020 | 4.1 – 26.7% |
| 2021 | 5.1 – 23.5% |
| 2022 | 3.2 – 18.3% |
| 2023 | 3.7 – 15.9% |
See this chart’s data
| Year | Between 35 and 39 |
|---|---|
| 2020 | 0 – 22.2% |
| 2021 | 0 – 27.1% |
| 2022 | 0 – 8.6% |
| 2023 | 7 – 25.3% |
See this chart’s data
| Year | Under 35 |
|---|---|
| 2020 | 4.9 – 52.2% |
| 2021 | 0 – 27.1% |
| 2022 | 19.2 – 59.1% |
| 2023 | 0 – 25.7% |
See this chart’s data
| Year | Between 35 and 39 |
|---|---|
| 2020 | 0 – 67.4% |
| 2021 | 2.3 – 35.8% |
| 2022 | 1.3 – 27.2% |
| 2023 | 4.3 – 28.1% |
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 |
|---|---|---|---|
| 2020 | H. Villarreal | 4.1 – 26.7% | Registro Nacional de Actividad 2020-Registro SEF |
| 2021 | H. Villarreal | 5.1 – 23.5% | Registro Nacional de Actividad 2021-Registro SEF |
| 2022 | H. Villarreal | 3.2 – 18.3% | Registro Nacional de Actividad 2022-Registro SEF |
| 2023 | H. Villarreal | 3.7 – 15.9% | 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 H. Villarreal profile
Source: “Registro Nacional de Actividad 2023-Registro SEF” (Spanish National ART Activity Registry) — registrosef.com, retrieved 31 July 2026.