Usually, poor doubling of HCG can be put on birth control. If the HCG value still shows a persistent downward trend after treatment, it suggests that it is not suitable to continue birth control, and you can consult with your medical professional whether to stop the pregnancy or not. HCG level in the blood in the early stage of pregnancy rises 1 times every 2-3 days, and it will decrease after reaching the peak in 8-10 weeks, and you can choose whether to keep the fetus in labor according to the reason of poor doubling of HCG.1. Abnormal quality of embryo: the embryo doesn’t get enough nutrients, which will lead to the poor doubling of HCG, and it is recommended to follow the doctor’s advice to carry out the treatment of keeping the fetus in labor, and at the same time the pregnant woman needs to adjust the daily diet and keep a good mood. If the HCG doubling is bad due to sperm deformity or poor follicle quality, it is not recommended to carry out birth control; 2, ectopic pregnancy: the fertilized egg is not in the uterine cavity, but outside the uterus, due to the growth of a poor environment, resulting in poor HCG doubling, it is not recommended to carry out birth control, and should be terminated in a timely manner; 3, preterm miscarriage: by the development of the embryo and the body of the pregnant woman’s blood levels of HCG will decline, at this time the patient There will also be hidden pain in the lower abdomen, a small amount of vaginal bleeding and other symptoms, at this time should be vigilant, actively cooperate with the doctor to carry out relevant examinations and treatment of abortion.HCG doubling is not good, ultrasound shows that the fetal heart, buds are normal, and there is no other discomfort, you can try to keep the baby. If the ultrasound examination finds that the embryo is not well developed and the HCG level is not growing very well, you can also observe the development of the gestational sac by ultrasound after 1 week of observation, and the combined hormone level and the ultrasound results will determine the effect of fertility preservation.