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.
The reproductive system produces gametes (sperm and eggs) via the division process called. 2. The organ where sperm cells mature is called the. 3. Sperm cells exit the penis via the. 4. A mature egg is released from the ovaries during the phase of the menstrual cycle.