*Primary: To compare the control group, women in the experimental group will have lower level of labor pain after the intervention of peanut ball usage.

*Secondary: To compare the control group, women in the experimental group will have higher level of support and control after the intervention of peanut ball usage; To compare the control group, women in the experimental group will have lower level of anxiety after intervention of peanut ball usage; To compare the control group, women in the experimental group will have shorter duration of labor after intervention of peanut ball usage.

We will ask the participants to join this research on the department of obstetric outpatient department, and give the consent form to sign. Then we will allocate the participant into the experiment group or the control group, furthermore, we will give the sheet which includes the information about peanut ball usage, like the destination, method, position, duration, and quick response code of the video.

When they finish the admission process in the delivery room, we will give the peanut ball to the participants who is in the experimental group, and the participants of the control group will receive the routine care of delivery room.

Inclusion Criteria:

1. vaginal birth;
2. pregnant women at ≥3 6 weeks of gestation;
3. greater than 20 years old of age;
4. no major obstetric or medical complications;
5. singleton pregnancy;
6. the partner will be accompanied during the labor;
7. cervical dilation is less than 5 cm;
8. able to listen, speak, read and write in Chinese;
9. complete the informed consent form.

Exclusion Criteria:

1. emergency cesarean section;
2. diagnosed with metal disease or drug abuser;
3. complicated with abnormality during labor.