The lack of response after the opening of one finger may be caused by the mother’s expected date of delivery, mental factors, abnormal fetal position, uterine factors and other reasons. 1. The due date has not yet arrived: when the due date has not yet arrived in late pregnancy, the cervix is one finger wide during vaginal examination, and there are no contractions or rupture of membranes at this time, which will not affect the fetus and can be observed first. 2. Mental factors: the first time a primiparous woman gives birth to a fetus, maternal mental tension, excessive fatigue, physical exertion will affect the uterine contraction, may also open a finger after no response. 3. Abnormal fetal position: abnormal fetal position in late pregnancy, such as cephalopelvic disproportion, fetal preluxation can not be close to the lower part of the uterus compression, can not be reflexive effective uterine contraction, will also be opened a finger after the lack of response. 4. uterine factors: maternal contractions due to excessive amniotic fluid, chronic uterine infections, uterine fibroids, uterine dysplasia and other reasons, will also be opened a finger after the lack of response. There are many reasons for the lack of response after the first finger, so it is recommended to go to the hospital for examination and then targeted treatment.