A little blood down there on the fiftieth day of pregnancy may be a case of preterm miscarriage and requires a prompt visit to the hospital for blood tests for HCG (human chorionic gonadotropin) and progesterone (P) concentrations and an ultrasound of the uterine appendages for the safety of the embryo in the uterus. Normally, the embryonic buds and primitive vascular pulsations can be seen on ultrasound at about 50 days of gestation. Based on the results of the examination, further treatment will be given and if necessary, medication will be used to preserve the pregnancy. If there is no abnormality in all tests, the embryo is developing well in the uterus. Pay attention to bed rest and avoid overexertion. During the first trimester, sexual intercourse is forbidden because the embryo is not yet firmly established in the uterus, so as not to overstimulate and induce contractions that may lead to adverse consequences.