A substitute or substitute good in economics and consumer theory is a product or service that a consumer sees as the same or similar to another product.
Postural orthostatic tachycardia syndrome (POTS) is one of a group of disorders that have orthostatic intolerance (OI) as their primary symptom.OI describes a condition in which an excessively reduced volume of blood returns to the heart after an individual stands up from a lying down position.n POTS, the lightheadedness or fainting is also accompanied by a rapid increase in heartbeat of more than 30 beats per minute, or a heart rate that exceeds 120 beats per minute, within 10 minutes of rising. The faintness or lightheadedness of POTS are relieved by lying down again.
What is polycystic ovary syndrome? Polycystic ovary/ovarian syndrome (PCOS) is a hormonal disorder defined by a group of signs and symptoms. These may include: Irregular or absent menstrual periods; Excessive hair on the face and body; Acne; Thinning hair on the scalp; Infertility; Ovaries with characteristic polycystic appearance or polycystic ovary (PCO) Elevated levels of male sex hormones such as testosterone; Weight gain; PCOS is considered a syndrome because signs and symptoms vary from woman to woman. Not all signs and symptoms may be present in an individual suffering from PCOS.