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.
Menstrual cycle basics to know. The menstrual or ovulation cycle is a cycle of events that will be repeating approximately every month in your body. In brief, the cycle length is usually within 21 to 35 days( average 28), and most girls will have their cycle length within 25 to 30 days. Menstrual bleeding itself usually last for about 3 to 7 days.