Final answer:
The average blood loss during menstruation is about 35 mL, and the menstrual cycle averages 28 days but can vary. Menstrual periods typically last 2 to 7 days, and women lose an average of 16-32 mg of iron monthly during menstruation.
Step-by-step explanation:
The average blood loss during a menstrual period is about 35 mL. Menstruation, also known as menses, is the process where if no fertilization occurs, the endometrium (the lining of the uterus) is shed. The average menstrual cycle is 28 days, but it can normally vary from 21 to 45 days. The duration of menstruation can also vary, typically lasting from 2 to 7 days. Additionally, during the menstruation phase, women lose iron, with the average loss being 16-32 mg per month, which can be compensated through dietary intake. It's important to note that these figures can vary greatly among individuals and even from month to month for the same person.