In the Philosophical Transactions there is an instance of a woman of sixty-eight having abundant lactation.
Warren, Boring, Buzzi, Stack, Durston, Egan, Scalzi, Fitzpatrick, and Gillespie mention rejuvenation and renewed lactation in aged women.
Ford has collected several cases in which lactation was artificially induced by women who, though for some time not having been pregnant themselves, nursed for others.
Prolonged lactation and galactorrhea may extend through several pregnancies.

Green reports the case of a woman of forty-seven, the mother of four children, who after each weaning had so much milk constantly in her breasts that it had to be drawn until the next birth.
At the time of report the milk was still secreting in abundance.

A similar and oft-quoted case was that of Gomez Pamo, who described a woman in whom lactation seemed indefinitely prolonged; she married at sixteen, two years after the establishment of menstruation.

She became pregnant shortly after marriage, and after delivery had continued lactation for a year without any sign of returning menstruation.

Again becoming pregnant, she weaned her first child and nursed the other without delay or complication.