The first one is the first one, and the second one will show up earlier than the first one, usually at 3-5 months, but because of the differences in weight, body type, diet and fetal condition of different pregnant women, the time of showing up may be earlier or later. 1. body type: pregnant women with thin body type have less abdominal fat, and the time of showing up will be more obvious, so the time of showing up is relatively early. The fat pregnant women with loose skin and more fat accumulation in the body, the pregnancy is less obvious, so the pregnancy time is later; 2, diet: some pregnant women have poor health, strong early pregnancy reaction, may cause nausea, vomiting, resulting in poor appetite, malnutrition, and weakness, the uterus becomes bigger slowly, the pregnancy time is later; on the contrary, if the pregnant women have better health, intake more nutrition, can make the pregnancy time relatively early or late. On the contrary, if the pregnant woman has a better constitution and consumes more nutrients, the time of conception can be relatively early; 3, the condition of the fetus: the time of conception is also early in twin and multiple pregnancies, and the earliest time of conception can be shown in 2-3 months. There is no correlation between the time of conception and the growth and development of the fetus, so pregnant women should pay attention to regular maternity checkups to closely observe the development of the fetus. Therefore, pregnant women should pay attention to regular maternity checkups to closely monitor the development of the fetus. They should eat a reasonable diet, take adequate vitamins and proteins, and avoid overeating to reduce the risk of gestational hypertension and gestational diabetes.