---
library_name: pyaging
tags:
- pyaging
- aging-clock
- biology
- dna-methylation
---

# bohlin

Official minimum-lambda variant of the Bohlin gestational-age LASSO: pyaging implements the 251-CpG lambda.min model and converts its day-scale output to weeks. The paper/package default one-standard-error variant uses 96 CpGs and has nearly identical predictive performance.

Model weights retain the original authors' terms; the pyaging software license does not relicense them.

| | |
|---|---|
| **Predicts** | gestational age |
| **Species** | Homo sapiens |
| **Tissue** | cord blood |
| **Data type** | DNA methylation |
| **Model type** | LASSO regression |
| **Year** | 2016 |

## Use with pyaging

```python
import pyaging as pya

pya.pred.predict_age(adata, ["bohlin"])
```

Browse every clock in the [pyaging Clock Catalogue](https://pyaging.readthedocs.io).

## Citation

Bohlin, J., Håberg, S. E., Magnus, P. et al. Prediction of gestational age based on genome-wide differentially methylated regions. Genome Biology 17, 207 (2016).

https://doi.org/10.1186/s13059-016-1063-4