1 · Upload Genotype Files or Pick a 1000 Genomes Sample

Converted files can be uploaded in the supported text formats. ZIP and GZ are also accepted; the same uncompressed size limit applies.

2 · Scoring Mode & Options

Default: Multi-Trait Genetic-Liability Score & Conditional Risk — weights the direct UKB score and genetically correlated trait scores to predict never-had-sex liability, using published accuracies, genetic correlations and 503 European reference genomes. The predicted gain is model-based; no cohort with genotypes and this outcome was available to test it.

Public reference data · no upload needed

Average scores across genetic reference groups

1000 Genomes Phase 3

Explore mean polygenic scores in five broad reference groups. These are genetic reference labels, not self-reported ethnicities. The map shows score calibration shifts; these values are not validated differences in traits or risk.

Loading public reference-map data…

Study Reference Data & Interpretation Guide (Abdellaoui et al., 2025)

Box 1 · Cautionary Notes on Interpreting Genetic Associations with Sexlessness

  • Not “genes for sexlessness”: Polygenic scores aggregate thousands of common variants of minuscule individual effect estimated in a contemporary Western cohort (UK Biobank, ages 39–73). They reflect a culture-specific interplay between heritable traits and social environments, not biological determinism.
  • Not predictive for individuals: SNP-based heritability is 17% (males) and 14% (females), but the study's own polygenic score explained only ~0.03% of observed variance in UK Biobank siblings (≈0.3% on the liability scale; Dataset S1 Tab 5). The authors state that these scores "are not suited to predict individual-level outcomes regarding sexlessness".
  • Ancestry calibration: Weights come from European-ancestry cohorts and percentiles are relative to the 503 European genomes of 1000 Genomes. For other ancestries they shift systematically (often by more than 1 SD; see the calibration table below) and should not be interpreted.
  • Socioecological context matters: By current address, male sexlessness was higher in regions with relatively fewer women (r = −0.07, P = 0.0004), and sexlessness was higher in regions with greater income inequality (Gini; pooled r = 0.15, P = 9.5×10−13; males r = 0.09, females r = 0.14). Associations by birthplace were not significant.
Genetic Correlations (rg) with Sexlessness Across Complex Traits (Fig. 3 & Dataset S1 Tab 7)

Selected LDSC genetic correlations between sexlessness (pooled, males, females) and 82 traits from Dataset S1 Tab 7. ‡ In the source table the reported rg and z have opposite signs for these traits (coding inconsistency); values are shown as published.

Combined Model & Risk Calibration Evidence

The original PGS002215 “no_sex” model had a covariate-adjusted partial correlation of 0.0313 (95% CI 0.0166–0.0460) in 17,730 held-out UK/Ireland participants (PGS Catalog, PPM012567). Its original training phenotype contained 3,320 cases among 347,296 participants. These data inform the risk scenarios; they do not validate the combined model. The displayed sensitivity range propagates the validation correlation bounds under fixed assumptions, not all sources of individual prediction uncertainty.

The default multi-trait score predicts never-had-sex liability with weights proportional to S−1c, where S is the reference covariance of the chip scores and ck = (score accuracy for its own trait) × (published genetic correlation with sexlessness) × (target SNP-heritability root). Accuracies come from published held-out evaluations or from summary-statistic associations with the Mills 2021 AFS/AFB GWAS. That identity reproduced observed associations implied by published AFS/AFB genetic correlations (slope 0.95, r = 0.88 across 14 checks). A Mills AFB summary-statistic probe and reference-genome covariance both place the direct score's accuracy below its published held-out anchor; the model combines all three (equivalent partial r ≈ 0.025 versus 0.0313 published). The model-based liability R² is several times that of the direct score alone, but this gain has not been measured in an outcome cohort. Build and validation details: reference/outcome_prediction/multitrait/validation.json.

The legacy trait-prior index uses published genetic correlations as heuristic priorities. Within-reference score correlations are not converted into genetic correlations. Related trait scores without validated genetic correlations remain available individually.

Out-of-Sample Polygenic Score Validation in the Australian Twin Cohort (Table 2 & Dataset S1 Tab 6)

Generalized estimating equation (GEE) results for the study's own sexlessness PGS in an independent Australian cohort (QIMR Berghofer, ages 18–89, N = 1,354–13,532). This table does not validate PGS002215 or this app's combined score.

1000 Genomes Phase 3 Reference Panel Calibration (N = 2,504 Real Genomes · PLINK 2 Verified)

z-score mean ± SD per super-population. Scores are standardised empirically against 1000 Genomes EUR on the exact SNPs present; the EUR column is out of sample (standardised on a random half, evaluated on the other half). "LD var. ratio" = empirical EUR variance ÷ the independence formula Σ2p(1−p)β²: values far above 1 show why finished PGS cannot be standardised analytically. Raw sums match PLINK 2 --score.