Theoretically, when a woman is pregnant with twins, her body will produce more human chorionic gonadotropin, and the chances and symptoms of early pregnancy reactions will be greater than those of a woman who is pregnant with one child. However, early pregnancy reactions do not occur in every woman, only in some cases, and it is not correct to judge whether you are pregnant with twins from early pregnancy reactions. If you can see two gestational sacs underneath the ultrasound, you will be diagnosed with twins, otherwise it is still a singleton.