"Prolongation of the lactation period beyond the usual time for weaning, from the ninth to the twelfth month, is common among ignorant and lazy women. Some women prolong lactation in the erroneous notion that it prevents renewed impregnation. Such lactation is injurious to the child, as a rule. Ploss says hyperlactation is frequent in Spain, and that some Japanese, Chinese, and Armenian women may nurse their children for years, but this practice in undoubtedly injurious, especially among European races."
- Austin O'Malley, knowledgeably
The Ethics of Medical Homicide and Mutilation (1919), pg. 155