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 ovulation cycle is a series of normal (physiological) changes occurring in a womanâs body, most remarkable in the genital organs, in view of normal reproduction. The cycle is geared towards preparing the female body for the conception of a pregnancy. It is a prerequisite for normal fertility in a woman.