When will pregnancy occur?

Early pregnancy vomiting reaction and blood HCG changes consistent, pregnancy 6-7 weeks when the blood HCG significantly increased, reaching several thousand, then began to show early pregnancy reaction. Pregnancy 9-10 weeks when the blood HCG reached the highest, reaching tens of thousands, then the most serious pregnancy vomiting. Pregnancy 12-14 weeks after the blood HCG gradually decreased, restored to several thousand, then the pregnancy vomiting will gradually ease or even disappear. For twin moles, gestational trophoblastic diseases, such as hydatidiform mole and other special circumstances, high blood HCG secretion is easy to cause severe pregnancy vomiting.