It is normal to have no reaction to pregnancy vomiting on the 45th day of pregnancy and the embryo check is well developed, and vice versa is abnormal. Pregnancy is a special time in a woman’s life, each pregnant woman’s pregnancy reaction is also different, pregnancy vomiting is not every pregnant woman, some may be from pregnancy to delivery, there has been no symptoms of pregnancy vomiting, and some may always have pregnancy vomiting. The absence of pregnancy vomiting in 45 days of pregnancy can be normal, or it may be due to fetal arrest, it is recommended to improve the ultrasound examination. During pregnancy, you should go to the obstetrics and gynecology department of the hospital on a regular basis, including ultrasound, if there is no abnormality in the ultrasound, then there is no need to worry too much about the absence of vomiting, just go to the hospital on time and consult with a professional physician for advice. A comprehensive examination can not only determine the health of the fetus, but also understand the physical health of the pregnant woman herself. During pregnancy, pregnant women should pay attention to do a good job of prenatal checkups, and actively listen to the advice of professional doctors to do a good job of comprehensive care and health care, which can effectively ensure the safety of the birth of the child.