I've been doing some research on twin birth, and have come across studies referencing intertwin interval and negative outcomes, and keep finding statements such as:
"In multivariate analysis, only intertwin birth time predicted umbilical cord pH. Arterial/venous pH decreased linearly at a rate of 0.00063 and 0.00081 U/min.... Our study confirmed that longer intertwin birth time is associated with a continuous slow decline in umbilical cord pH...."
"Increasing time interval was related to a decline in the mean umbilical arterial pH and base excess, and fetal acidosis, ..."
"The umbilical arterial blood gas status of the second twin worsened with increasing twin-to-twin delivery interval, and pathologic fetal acidemia (pH<7.0) might develop in the second twin when the twin-to-twin delivery interval was greater than 20 minutes."
So, I'm not a moron, and I get the general gist that the longer the time between twins, the greater the tested risks. I don't know yet if they controlled for things regarding active management of the 2nd twin (such as whether or not 2nd twins had increased pitocin to rush them, other obstetric management or interventions), but I'll be looking into that.
My main questions for now are about the pH. What is normal umbilical arterial pH? How can a lowered pH affect the baby (like what are the symptoms or long-term complications it can cause)? Is it a temporary thing that resolves on its own, or does it require treatment to correct once it happens?
TIA to anyone who has some knowledge in this area!
Wife of one and mom of five, including my HBAC twins!