Yes.

Women cannot donate blood during menstruation.

Blood donation should avoid the menstrual period and the three days before and after, people in the stage of persistent blood loss can't donate blood for the time being, what's more, the three days before and after women's menstruation, the endocrine and physiological regulation of the body's activities and other aspects are different from the usual.

Women who donate blood at this stage are not favorable to both the donor and the recipient.

The essence of women's menstruation is the regular physiological shedding of the uterine lining, during which the body itself will be in a state of damage, which will make the body's resistance and immunity to decline, but also affects the body's endocrine system; and physical strength is weaker, the menstrual period to donate blood will also increase the chances of adverse reactions, so it is recommended that female friends in the three days before and after menstruation as far as possible not to donate blood.

Expanded:

p>Women's immunity is weaker before and after menstruation, and they are prone to get sick from blood loss. You can't pull out a tooth, donate blood, draw blood, or have an operation, etc. Don't do anything that will bleed during your period, because that will not be conducive to blood clotting. Because of menstruation, blood coagulation is slow, the wound is not easy to heal, but also easy to cause blood loss, harm to the body.

Women lose different amounts of blood during menstruation due to individual differences, so it is recommended not to donate blood during menstruation in order to ensure the safety of donors. But you don't have to be nervous about donating blood because you didn't anticipate an early menstrual period. 200 ml of blood accounts for no more than 5 percent of the total blood volume in your body, and your body is able to compensate for it quickly, so it won't do you any harm.

Baidu Encyclopedia - Non-remunerated Blood Donation