The symptoms of pregnancy with a second child and pregnancy with a first child are not the same for most women. Because pregnancy with a second child and pregnancy with a first child are two different fetuses, they may have different sexes, different quality of fertilized eggs, and different weights, among other factors, which cause the symptoms of pregnancy with a second child to appear different from those of pregnancy with a first child. If the quality of fertilized eggs is different, some fertilized eggs are of good quality and HCG rises quickly, in this case estrogen and progesterone levels are also high and early pregnancy reactions are more likely to occur, and some people have early pregnancy reactions that are heavier than those of the first child. If the early pregnancy reaction is too heavy, with nausea and vomiting leading to inability to eat, or even significant weight loss, you should go to the hospital for a checkup and take symptomatic treatment if necessary.