Updated by: Arabinda Naik
Menstrual Cycle: 1. The menstrual cycle is primarily found in humans and a few other primate species. Its primary purpose is to prepare the female body for potential pregnancy and to support the implantation of a fertilized egg. If fertilization does not occur, the uterine lining is shed in the form of menstruation.
2. In the menstrual cycle, females typically experience menstrual bleeding, commonly referred to as "periods." This bleeding occurs when the uterine lining is shed.
3. The menstrual cycle typically occurs on a monthly basis in humans and some primates.
Estrous Cycle: 1. The estrous cycle is more common in non-primates and some mammals. Its main purpose is to prepare the female for mating and reproduction. If fertilization does not occur, the female typically reabsorbs the uterine lining, does not have a visible external menstrual bleeding.
2. In most species with estrous cycles, there is no visible external bleeding. Instead, any shedding of the uterine lining is reabsorbed by the body, and there is usually no noticeable discharge.
3. The estrous cycle frequency varies among species but can occur more frequently than the menstrual cycle. It can be as short as a few days to several weeks, depending on the species.