HCG is an indicator to determine the intensity of fetal activity. The presence of doubling of HCG every other day is a normal phenomenon, because in the case of a well-developed fetus, there will be doubling in about 1.5 days, indicating that the fetal development is possible and is a normal performance. If possible, an ultrasound should be done at about 42 days of pregnancy to determine whether the pregnancy is intrauterine or ectopic to ensure the health of the fetus. The first thing you need to do is to take oral folic acid to prevent fetal neural tube abnormalities and to ensure the stability and health of the fetus.