It turns out that they have the purchase history for hundreds of thousands of customers and they compute what they call a pregnancy score, which is not just whether or not a woman's pregnant, but what her due date is.
Resulta que ellos tienen el historial de compras de cientos de miles de clientes y calculan lo que llaman puntaje de embarazo, que no se trata de si la mujer está o no embarazada, sino para cuándo espera.