In the 6th week of pregnancy, the value of progesterone is around 30ng/ml, the normal range of blood HCG will be around 10000IU/L, the value of progesterone is low, if it is lower than 15ng/ml, it is easy to have lower abdominal pain, a small amount of vaginal bleeding and other cases of preterm abortion. the fluctuation range of HCG is large, as long as it is within the normal range, if the HCG doubles every other day and rises very well, it mostly indicates the embryo development. If the HCG doubles well every other day, it indicates that the embryo is developing well. A bad doubling often indicates that the level of chorionic gonadotropin secreted by the corpus luteum of the ovary is low, leading to preterm miscarriage or embryonic abortion. At 6 weeks of pregnancy, when the menstrual cycle is regular, the early growth and development of the fetus is predicted by testing the level of progesterone and HCG values, as well as the gynecological ultrasound of the intrauterine gestational sac and fetal buds. At 6 weeks of pregnancy, it is also important to take proper rest, keep a relaxed mood and have a reasonable and diversified diet in order to facilitate the growth and development of the fetus.