Which hormone is largely responsible for mood changes during PMS?

• A. Progesterone
• B. Estrogen
• C. Testosterone
• D. Luteinizing hormone

Answer: (A)

Progesterone is largely responsible for mood changes during premenstrual syndrome (PMS) due to its significant influence on the brain and its interaction with neurotransmitters. During the luteal phase of the menstrual cycle, progesterone levels rise, and when these levels fluctuate or drop leading up to menstruation, it can lead to a range of emotional and physical symptoms, including mood swings, irritability, and even depressive symptoms.

Progesterone has effects on the GABA receptor, which plays a role in calming the nervous system. Changes in GABAergic activity can contribute to feelings of anxiety or mood disturbances that many individuals experience before their period. Furthermore, the interplay between progesterone and other hormones can also exacerbate emotional symptoms due to its combined effects on serotonin and other neurotransmitters linked to mood regulation.

The other hormones listed, while they do play roles in the menstrual cycle and overall hormonal balance, are not as directly tied to the specific mood changes associated with PMS as progesterone is. Estrogen can have mood-enhancing effects, but its relationship is more complex and can involve both positive and negative influences. Testosterone and luteinizing hormone do not have a primary role in the mood changes experienced during PMS, making progesterone the most relevant