OB Midterm Exam questions with correct answers

Uterine Stretch Theory Correct Answer-When maximum stretch, uterus gives up and random partial contractions occur Rhythmic contractions lead to delivery of baby Oxytocin stimulation theory Correct Answer-Causes uterine contractions Probably a factor but is not the entire thing for labor Progesterone withdrawal theory Correct Answer-End of pregnancy, these levels will drop off If not adequte levels, will likely have a miscarraige` Fetal cortisol and placental degeneration theory Correct Answer-If you give sheep high levels of cortisol, they will go into labor Fetal membrane phospholipid-arachadonic acid-prostaglandin theory Correct Answer-Precursor hormones in placenta that get into moms blood stream and more hormones increase See higher levels of these in women who are in labor Contractions Correct Answer-Firing and shortening of muscle fibers in the uterus Muscle fibers of the uterus run up and down. When they relax, the lengthen. Eventually they will get very short over time.