The causes of serious constipation in 9 weeks of pregnancy mainly include changes in hormone levels, reduced activity during pregnancy, and irrational dietary structure during pregnancy. 1. Hormone level changes: during early pregnancy, progesterone and growth inhibitor secretion increases, resulting in gastrointestinal smooth muscle weakening, gastrointestinal peristalsis slows down. 2. Reduced activity during pregnancy: Early pregnancy pregnant women are often due to fetal instability or miscarriage and other reasons, reduced activity or even bed-ridden to protect the fetus caused by intestinal peristalsis slowed down, aggravating constipation. 3. unreasonable dietary structure during pregnancy: after pregnancy, the family in order to take care of pregnant women, always constantly fish and meat, resulting in a high protein diet, ignoring the supplementation of dietary fiber, resulting in an unreasonable dietary structure; or early pregnancy due to early pregnancy reaction, reduce fluid diet and water intake, will also aggravate constipation. In addition to supplementing the necessary protein during early pregnancy, attention should be paid to supplementing dietary fiber, eating more fresh fruits and vegetables, paying attention to water supplementation, such as physical conditions allow, appropriate exercise, such as yoga during pregnancy, pregnancy exercise, walking, etc., and at the same time, pay attention to maintaining good defecation habits. If the above measures are ineffective or the condition worsens, you should consult the obstetrics outpatient clinic in a timely manner and promote defecation with the help of medication under the guidance of the doctor, so as not to cause hemorrhoids, preeclampsia and other undesirable consequences due to straining to defecate.