Whether or not the embryo can still be taken after 50 days of slow development should be decided in conjunction with the menstrual cycle as well as the blood HCG and the development of the fetal buds and the fetal heart. More than 50 days pregnant to check the development of delayed is likely to be usually women’s menstrual cycle is on the long side caused by the menstrual cycle, if the menstrual cycle is long, late ovulation will be delayed phenomenon, usually about a week difference is normal, you can follow up on the development of the embryo. Delayed embryonic development should also check whether the blood HCG is normal, if the blood HCG doubles normally, and there are normal fetal buds and fetal heart, it means that it is normal. There are individual differences in embryonic growth and development, as long as there is not much difference from normal development, the pregnancy can continue, and the pregnant woman should pay attention to reasonable increase in nutrition and do a good job of review. However, if the embryo has no buds and heartbeat or the HCG doubling is not good, it is necessary to consider the possibility of abnormal development of the embryo, and timely termination of pregnancy is necessary.