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Henci GoerFind out what other moms-to-be are asking.  Join in the discussion with Henci Goer, an expert in obstetric research. If you would like to contact Henci outside of the Ask Henci forum, send an email to Goersitemail@aol.com.

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Reply To Topic Topic: Pitocin
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Posted By on 17 Jul 2006 09:30 AM
It's weird sometimes how right after you learn something new, you find a use for it. I have just returned from Australia where I heard a talk by Dr. Sarah Buckley on the topic of hormones during labor. I knew a little about this before, but this is an area of special interest to her. Here is what she says about oxytocin:

Oxytocin is released from the pituitary gland, which lies deep in the brain, during sexual activity, orgasm, during labor and birth and the delivery of the placenta, during breastfeeding, through touch, and when sharing a meal. In addition to causing rhythmic uterine contractions, high oxytocin levels make us feel loving, positive, calm, and connected. For this reason, it is called "the hormone of love." The baby also produces it. Levels peak in the baby at the time of birth and are elevated for at least 4 days following it. Oxytocin levels are enhanced in both mother and baby by skin-to-skin and eye-to-eye contact and by the baby nuzzling the breast and suckling. Oxytocin is also present in breastmilk. Oxytocin may also act as a pheremone or have its effects transmitted through smell. Animal studies show that oxytocin administered to one animal has effects on its untreated cage mates. This may explain the positive feelings that may be engendered in birth helpers who are with a woman birthing with peak levels.

But here's the catch: oxytocin produced naturally by the pituitary circulates within the brain in the cerebrospinal fluid, but oxytocin cannot cross the blood-brain barrier. This means that women get none of these positive effects when synthetic oxytocin (Pitocin or "Pit"; Syntocinon or "Synto") is given intravenously. This, of course, explains why women don't like labors that are induced or augmented with oxytocin. They may get stronger contractions but none of the beneficial mental effects that help them tolerate them or feel good about themselves, the labor, or the baby.

-- Henci By: Henci Goer
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