Study of the Type of Pushing at Delivery

"Description of the intervention in the intervention group: Directed open-glottis pushing (with prolonged exhalation) must be explained to the women and professionals as follows:~After inhaling deeply, the patient will exhale while pulling in her stomach in such a way they she can use the contraction of her abdominal muscles to help the fetus descend through the birth control. She should push as long as possible~Description of the intervention in the control group: Directed closed-glottis pushing (pushing while holding one's breath) should be explained to the women and professionals as follows:~After inhaling deeply, the patient should push very hard downwards to the perineum, while holding the inhaled breath in her lungs. She should push as hard and as long as possible."

"Description of the intervention in the intervention group: Directed open-glottis pushing (with prolonged exhalation) must be explained to the women and professionals as follows:~After inhaling deeply, the patient will exhale while pulling in her stomach in such a way they she can use the contraction of her abdominal muscles to help the fetus descend through the birth control. She should push as long as possible~Description of the intervention in the control group: Directed closed-glottis pushing (pushing while holding one's breath) should be explained to the women and professionals as follows:~After inhaling deeply, the patient should push very hard downwards to the perineum, while holding the inhaled breath in her lungs. She should push as hard and as long as possible."