Susten (Progesterone) is a hormone replacement therapy used for treating infertility and other hormone-related conditions. It helps to regulate the menstrual cycle and can help to stimulate ovulation in women. It is available in both oral and injectable forms and is safe for use in the United States. Susten (Progesterone) is designed to help women maintain a healthy hormonal balance and can help to reduce symptoms associated with menopause. With its easy-to-use delivery system, Susten is an ideal choice for those looking for natural relief from hormone-related issues.