Reactions before pregnancy, what are the differences from the reactions before menstruation?

Patient's question:

No

Doctor's answer:

Hello, generally, fatigue and weakness (apathy) can occur before menstruation, along with irritability, bloating, swelling in the limbs, anxiety/tension, breast tenderness, emotional instability, depression, cravings for certain foods, acne, increased appetite, oversensitivity, edema, restlessness and irritability, tearfulness, a preference for solitude, headaches, forgetfulness, gastrointestinal symptoms, difficulty concentrating, hot flashes, palpitations, and dizziness, among others.
In the early stages of pregnancy (around six weeks post-menstruation), the hormone human chorionic gonadotropin (HCG) increases in a pregnant woman's body, while gastric acid secretion decreases and gastric emptying time extends. This leads to a series of reactions such as dizziness and fatigue, loss of appetite, a preference for sour foods or aversion to greasy foods and nausea, morning vomiting, which are collectively referred to as pregnancy symptoms.
Some premenstrual symptoms and early pregnancy symptoms are similar, and symptoms should not be used as a standard for determining pregnancy.