411 REFERENCE · Wiktionary
Hellin's law
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Originated in an 1895 paper by D. Hellin.
Proper noun
The principle that the frequency of x multiple births from natural pregnancies is approximately 1:89x-1.
Synonyms
Hellin-Zeleny law
en eponyms