Her only married sister had similar enlargements at her third confinement.
Polymazia sometimes seems to be hereditary.

Robert saw a daughter whose mother was polymastic, and Woodman saw a mother and eldest daughter who each had three nipples.

Lousier mentions a woman wanting a mamma who transmitted this vice of conformation to her daughter.

Handyside says he knew two brothers in both of whom breasts were wanting.
Supernumerary nipples alone are also seen, as many as five having been found on the same breast.

Neugebauer reports eight supernumerary nipples in one case.