The Function from the Cervical Os during pregnancy and Giving birth

 

what is short cervix,how does it happen & what are its complications

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What is the normal cervical length for normal delivery? Dr. H S Chandrika

Video taken from the channel: Doctors’ Circle World’s Largest Health Platform


 

What is Internal OS? Internal OS क्या होता है? #internalosclosed #internalosinpregnancy #twinsmyworl

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TMT: The Cervix in Pregnancy by Dr Alpana Joshi

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Cervical Insufficiency and Pre-Term Birth Video Brigham and Women’s Hospital

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Labour Process: The Cervix Explained

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Normal labor (ordinary delivery)

Video taken from the channel: MedLecturesMadeEasy


The Role of Cervical Os in Pregnancy Just as it changes shape and position before a woman is pregnant, after conception and the implantation of the fertilized egg in the uterus, the cervical os changes in response to the stage of pregnancy and growth of the developing fetus. The internal cervical os is central to preserving an effective barrier to ascending microorganisms; weakness may increase the risk their triggering preterm birth. Reconstructive research techniques may further determine the anatomy of the cervix in the region of the internal os, defining its role in normal pregnancies and those complicated by prematurity.

Between 37 and 42 weeks of pregnancy, the cervix tends to shift forward, pointing toward the front of the vagina. It gets softer and starts to widen and open (also known as dilating), and thin (or efface). If this isn’t your first baby, the cervix is already softer and a.

The structure of the cervix is integral to the maintenance of pregnancy, keeping the developing baby in utero and forming a barrier to the ascent of microorganisms from the vagina. Weakness of the. However, a cervical exam at this stage does allow a practitioner to determine dilation and possibly the position of the baby, which can help define when labor actually does (or did) start. Overview Most practitioners will do an initial cervical exam at the beginning. Through your pregnancy and during labor, your cervix goes through the following different changes: 1. The cervix is designed in such a way to protect development of the fetus.

It remains closed and provides support to the growing fetus and the uterus in an expectant mother’s body. The cervical length was significantly shorter among patients who delivered vaginally than those delivered by CS (P -value < 0.001). Multiple factors had a significant role in the prediction of the mode of delivery (cervical length, BMI, the onset of labor, parity). The opening of the ectocervix to the vagina is called the external os. Although studies of cervical length in non-pregnant women are few, it is acknowledged that the size and shape of both the cervix and the external os differ in women (Pardo et al., 2003; Mazouni et al., 2005) and vary with age, hormonal changes, parity and surgical treatments.

Let us first understand the role of this tiny organ and why a closed cervix in pregnancy is necessary. Cervix During Pregnancy. The cervix is the part connecting the vagina to the uterus. In normal times, there is also a discharge of sticky whitish cervical mucus during ovulation. The cervix plays a major role in childbirth.

As the fetus descends within the uterus in preparation for birth, the presenting part, usually the head, rests on and is supported by the cervix. As labour progresses, the cervix becomes softer and shorter, begins to dilate, and rotates to face anteriorly.

List of related literature:

Its main function is to maintain the corpus luteum during early pregnancy, allowing for continued secretion of oestrogen and progesterone to maintain the pregnancy, and to prevent the shedding of the endometrium, as usually occurs during the menstrual cycle.

“Emergency and Trauma Care for Nurses and Paramedics” by Kate Curtis (Trauma clinical nurse consultant), Clair Ramsden, Ramon Z. Shaban, Margaret Fry, Julie Considine
from Emergency and Trauma Care for Nurses and Paramedics
by Kate Curtis (Trauma clinical nurse consultant), Clair Ramsden, et. al.
Elsevier Health Sciences Apac, 2019

The successful maintenance of the pregnancy requires that spontaneous phasic myometrial contractions are suppressed and the cervical canal is firmly closed so as to provide physical support for the growing fetus.

“Essential Reproduction” by Martin H. Johnson
from Essential Reproduction
by Martin H. Johnson
Wiley, 2012

The molecular and cellular bases for cervical remodeling during pregnancy and parturition are largely dependent on the regulation of extracellular matrix components.35-41 Softening of the cervix begins in early pregnancy.

“Creasy and Resnik's Maternal-Fetal Medicine: Principles and Practice E-Book” by Robert Resnik, Robert K. Creasy, Jay D. Iams, Charles J. Lockwood, Thomas Moore, Michael F Greene, Lesley Frazier
from Creasy and Resnik’s Maternal-Fetal Medicine: Principles and Practice E-Book
by Robert Resnik, Robert K. Creasy, et. al.
Elsevier Health Sciences, 2008

main function is to maintain the corpus luteum during early pregnancy, allowing for continued secretion of oestrogen and progesterone to maintain the pregnancy, and to prevent the shedding of the endometrium, as usually occurs during the menstrual cycle.

“Emergency and Trauma Care for Nurses and Paramedics” by Kate Curtis, Clair Ramsden
from Emergency and Trauma Care for Nurses and Paramedics
by Kate Curtis, Clair Ramsden
Elsevier Health Sciences, 2011

The finding that administration of progesterone receptor antagonists during pregnancy caused cervical ripening and uterine contractions supports a role for progesterone in the maintenance of uterine quiescence.

“Brody's Human Pharmacology E-Book” by Lynn Wecker, Lynn Crespo, George Dunaway, Carl Faingold, Stephanie Watts
from Brody’s Human Pharmacology E-Book
by Lynn Wecker, Lynn Crespo, et. al.
Elsevier Health Sciences, 2009

(c) Circular fibers: importance—prevent reflux of menstrual blood from the uterus into the fallopian tubes, control entry of the embryo into the uterus for implantation, and retain the fetus until proper time for birth; location—constriction around fallopian tubes and internal cervical os.

“Study Guide for Foundations of Maternal-Newborn and Women's Health Nursing” by Sharon Smith Murray, MSN, RN, C, Emily Slone McKinney, MSN, RN, C
from Study Guide for Foundations of Maternal-Newborn and Women’s Health Nursing
by Sharon Smith Murray, MSN, RN, C, Emily Slone McKinney, MSN, RN, C
Elsevier Health Sciences, 2013

Thus, the cervix serves a key mechanical role during pregnancy to either contain and protect the conceptus in the uterus or allow its passage into the vagina.

“Knobil and Neill's Physiology of Reproduction” by Tony M. Plant, Anthony J. Zeleznik
from Knobil and Neill’s Physiology of Reproduction
by Tony M. Plant, Anthony J. Zeleznik
Elsevier Science, 2014

Spontaneous preterm births are preceded by activation of one or more steps of the parturition process: cervical ripening, membrane and decidual activation, and coordinated uterine contractility (see Chapter 6).

“Creasy and Resnik's Maternal-Fetal Medicine: Principles and Practice E-Book” by Robert Resnik, Charles J. Lockwood, Thomas Moore, Michael F Greene, Joshua Copel, Robert M Silver
from Creasy and Resnik’s Maternal-Fetal Medicine: Principles and Practice E-Book
by Robert Resnik, Charles J. Lockwood, et. al.
Elsevier Health Sciences, 2018

This hormone increases flexibility of the pubic symphysis and helps the cervix dilate, assisting in childbirth.

“Mosby's Pathology for Massage Therapists E-Book” by Susan G. Salvo
from Mosby’s Pathology for Massage Therapists E-Book
by Susan G. Salvo
Elsevier Health Sciences, 2013

Because blood concentrations of PG increase during labor, PGF2a is viewed as important for prepartum lysis of the corpus luteum, which removes the progesterone block, and for evoking uterine contractions during parturition.

“Veterinary Pharmacology and Therapeutics” by Jim E. Riviere, Mark G. Papich
from Veterinary Pharmacology and Therapeutics
by Jim E. Riviere, Mark G. Papich
Wiley, 2009

Oktay Kutluk

Kutluk Oktay, MD, FACOG is one of the world's foremost experts in fertility preservation as well as ovarian stimulation and in vitro fertilization for infertility treatments. He developed and performed the world's first ovarian transplantation procedures as well as pioneered new ovarian stimulation protocols for embryo and oocyte freezing for breast and endometrial cancer patients.

Mail: [email protected]
Telephone: +1 (877) 492-3666

Biography: https://medicine.yale.edu/profile/kutluk_oktay/
Bibliography: oktay_bibliography

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4 comments

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  • Mam my first baby ku stitching pannanga. So second baby try pannalama same problem varuma mam. 1 year try pandra iam not pregnant plz mam reply plz

  • I m 5 months pregnant.is sex necessary for normal delivery.and stomach is also tight some time..wt should I do for normal delivery…can I finger in my cervix or not…or it is dangerous…plz reply….how to stretch my cervix..

  • I’ll never forget the gush of when the nurse pushed my belly afterwards and I could hear all of the blood plus my placenta fall into a garbage bag.

  • Mam Naku 20 weeks pregnant lo 2.9 cervical length doctors suggest proloton injection for 4 weeks weekly once one injected….it’s ok na mam….plz tell me