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During childbirth, the baby passes through the vagina (birth canal). The hymen is a thin membrane of tissue that surrounds and narrows the vaginal opening. this video, created by nucleus medical media, depicts a normal vaginal birth using a time-lapse effect. Strong uterine contractions push the fetus (baby) forcibly through the birth canal during labor. Vaginal secretions are primarily from the uterus, cervix, and vaginal epithelium in addition to minuscule vaginal lubrication from the bartholins glands upon sexual arousal. It takes little vaginal secretion to make the vagina moist secretions may increase during sexual arousal, the middle of or a little prior to menstruation, or during pregnancy. During a vaginal delivery, your baby passes through your dilated cervix and pelvis into the world. For some babies, this trip through the birth canal doesnt go smoothly. Your vaginal canal and the opening of your vagina will stretch a great deal to allow a baby to pass through. Some women who give birth may notice a change in their vagina, such as it feeling loose. once the shoulders emerge through the birth canal,the rest of the baby slides out easily. After the baby is born,the umbilical cord is then cut,by the doctor or midwife.