Mom, your brain will begin to release oxytocin into your blood stream.
This hormone will stimulate your uterus to begin contractions. Your ovary
will release a hormone that relaxes your cervix. The weight of your baby
on the now relaxed cervix will begin dilation. As labor begins, your
vagina will release a complex carbohydrate called glycogen. This will
metabolize to become lactic acid, which fights against infection.
Contractions will begin, and you continue on to full labor.