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.
III. Female Reproductive System The major structures of the female reproductive system are shown in Fig. 28.3. The female gonads are the ovaries. The female duct system includes the uterine (or fallopian) tubes, the uterus, and the vagina. Mammary glands secrete milk to nourish a newborn child, and greater vestibular glands lubricate the vagina.