In mammals, the period during a female's reproductive cycle (also known as the oestrus cycle or menstrual cycle) when mating is most likely to occur. It usually coincides with ovulation, when egg cells are released from the ovary.
White stands for the snowy peaks of the Andes. Red symbolizes the blood shed by the freedom fighters. Blue represents the clear Andean skies. Effective date: c. 18 October 1817.