The common reasons for the slow development of the gestational sac are mainly pre-eclampsia miscarriage, insufficient nutritional intake, influence of external factors, luteinizing hormone deficiency, chromosomal abnormalities, etc. 1. pre-eclampsia miscarriage: after the preservation of the pregnancy by pre-eclampsia miscarriage, the slow development of the gestational sac may occur in stages; 2. insufficient nutritional intake: pregnant women usually have low nutrient intake or picky eating, which may lead to nutritional deficiency and cause the slow development of the gestational sac; 3. influence of external factors: such as physical or chemical stimulation, viral infection, etc. may lead to the slow development of the gestational sac; 4. 3, external factors: such as physical and chemical stimulation, viral infection, etc., may lead to slow development of the gestational sac; 4, luteinizing hormone deficiency: if no clear cause of slow development of the gestational sac can be found, it is generally considered to be caused by luteinizing hormone deficiency; 5, chromosomal abnormalities: slow development of the gestational sac may also be caused by chromosomal abnormalities, at this time the fetus may appear fetal arrest or miscarriage There is no better treatment for this. The following measures can be taken for the slow development of the gestational sac: 1. You should be admitted to the hospital for progesterone check, blood HCG check and thyroid function check, and you can also wait until after 8 weeks of pregnancy for ultrasound check to ensure the normal development of the fetal heart and fetal bud in the uterus; 2. The first thing you need to do is to take care of the fetal heart and fetal bud development; 2.