menstrual period; days of one's period
Refers to the duration or days of menstruation. Often used in medical or personal health contexts. Compare with 生理日, which can refer to a specific day of the period.
See also: 生理日
Please take care of your health during your menstrual period.
If your menstrual period is long, consult a doctor.
生理日 refers to a specific day of the menstrual period, while 生理期間 refers to the entire duration.
生理 is a broader term for menstruation or physiology, while 生理期間 specifically means the period of menstruation.
Compound of 生理 (menstruation, physiology) and 期間 (period, duration).