Then the palace mouth quickly opened, to the first stage of the active period, the palace mouth open 4 ~ 8 cm. At this time, the production process is the most compact, the strongest contraction period, is also relatively difficult period. Every 2 to 4 minutes of the uterus contraction, sustained 60 seconds.

At this time, pregnant mammy should try to relax, with her eyes fixed on a point, but also take the principle of nasal inspiratory mouth breath, with contractions of the enhanced and accelerated respiration, whereas with contractions of the slow and slow breathing.

Formula:INHALE 2 3 4,EXHALE 2 3 4,INHALE 2 3,EXHALE 2 3,INHALE 2,EXHALE2,INHALE EXHALE

3\In the palace mouth when complete, uterine change closely, an interval of 30 to 90 seconds, for 60 ~ 90 seconds. Palace mouth from 8 centimeters fast open to 10 cm.

Pregnant mother at this time to maintain relatively high respiration, occur in the throat, slightly open mouth breathing (hee hee hee hee sound). Pay attention to the gas volume to be balanced, to avoid over breathing. Each contraction comes, continuous 4 ~ 6 fast breath breath any more.

Formula:in,in,in,in,ex. in,in,in,in,ex.

4\In the second stage of labor, to better cope with the mother during pregnancy, with good, fast delivery. It must be hard to stop uterine contractions, rest, relax. Uterine contraction, to inhale after choking, press down hard. Head can be raised to the direction of the navel, mandibular forward. As far as possible holding for 20 ~ 30 seconds, immediately after suction mouth breath, and breath on exertion until the end of contraction.5\In cervical nearly full, fetal presentation division of pelvic floor, pregnant mother will have a kind of unconscious downward force of feeling, in order to avoid premature force caused by cervical edema affecting the production process. This can be employed "breathe" movement, also can be used for fetal head delivery process in order to avoid using force is too fierce cause perineal laceration midwives will make pregnant mammy "breathe".