A single Regional Dressage Championship program organized by the United States Dressage Federation (USDF), and recognized by the United States Equestrian Federation, Inc. (USEF), will be held in each of the nine USDF.
If fertilization and/or implantation does not take place, the system is designed to menstruate (the monthly shedding of the uterine lining). In addition, the female reproductive system produces female sex hormones that maintain the reproductive cycle.
Ovulation is one part of the female menstrual cycle in which part of the ovary discharges an egg for reproduction. A female is most fertile at this point. Ovulation is one part of the female menstrual cycle in which part of the ovary discharges an egg for reproduction.