Period delayed 21 days, morning urine tests are negative

Female menstruation delayed 21 days, morning urine test is negative many times, this means that the body is not pregnant, but at this time also need to go to the hospital to review the blood HCG value, if the blood HCG value is normal, can give progesterone intramuscular injection treatment, continuous use for three days, generally in the withdrawal of 3-7 days after menstruation will come.