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Birth canal

Pregnancy & Parenting  Biphasic  Birth center

This week your baby may drop into the birth canal, this is called 'lightening' or 'dropping'. If this is not your first baby, this 'lightening' may not occur until right before labor. Your care provider may refer to it by saying that your baby is now 'engaged'.


Birth Canal
This is more commonly referred to as the vagina and is the passage between the cervix and the outside world through which the baby travels on the way to being born.
Birth centre ...

Birth Canal-This is the pathway through which a baby travels in order to be born. The birth canal is formed by the cervix, vagina, and vulva.

Birth canal: The passageway the baby travels through during birth. It is made up of the cervix, vagina, and vulva.
Birth defect: An abnormality in a baby caused by an error during fetal development. Birth defects may or may not be genetic.

Birth canal
The tunnel comprised of the vagina and cervix, through which the infant must pass from the uterus during birth.

birth canal (burth kuh-NAL) - See vagina.
birth control (burth kuhn-TROHL) - Also called contraception or family planning. Things you can do to keep from getting pregnant. Using a condom and taking a birth control pill are examples of birth control.

If her birth canal is obstructed due to physical reasons
If she has herpes or other infections that could affect the baby
If she has placental abnormalities ...

Vagina - The birth canal.
Vaginal Birth - The delivery of a baby through the birth canal.
Vaginal Birth After Cesarean - The birth of a baby through the birth canal when a cesarean has been done in the past.

Passage through the birth canal often makes a newborn's head appear pointy or elongated for a short time. It's normal for a baby's skull, which is made up of several separate bones that will eventually fuse together, to be slightly misshapen during the few days or weeks after birth.

The baby enters the birth canal with their bottom or feet first as opposed to the normal head first presentation.
Brow/face presentation
When the baby's brow/face is leading the way down the birth canal.

Can transfer in the birth canal during delivery
M - Antibiotics approved by OB/GYN
B - Antibiotics are given in the eyes to prevent infection ...

A tourist on the birth canal
7 May I have often heard from members of my parent's generation how refreshing it is to see men nowadays involved in all aspects of child raising.

If the baby is face-up, this is called posterior--as opposed to anterior, and having nothing to do with anyone's derriere--and this is a difficult way to deliver a baby, because they don't fit as well through the birth canal face-up.

She said the baby's head was swollen already from trying to get into my birth canal. (I am 5 feet tall). She said her mom was little like me and had to have 5 c-sections with all of her babies. I did not want my child to suffer. I did not want to hurt him in any way.

The woman can remain active in pushing the baby through the birth canal. It is used for vaginal deliveries.

In the second stage of labour, the baby is expelled from the womb through the birth canal by both the uterine contractions and by powerful abdominal contractions ("bearing down"). The baby is most commonly born head-first.

If the baby is too large in relation to the passage size of the birth canal, spontaneous vaginal delivery may be difficult, labor may arrest, and a cesarean section could be required.

Your baby's bones will be becoming harder but his / her scalp will still be relatively soft for ease of passage through the birth canal.

If there is an absolute indication (as outlined previously), such as the placenta blocking the birth canal (placenta praevia) or the baby lying crossways.

Your other goal is to relax and let the birth canal and perineum open up for the baby. To achieve this, try to
- Relax your abdominal muscles by putting one hand on your lower belly and pushing it out as you breathe in.
- Visualize everything opening up to let the baby out.

However, if after an hour or more, the baby's head is not moving down in the birth canal with contractions or pushing, your obstetrician will consider whether to assist the delivery.

Some fetuses present with their buttocks or feet pointed down toward the birth canal (a frank, complete or incomplete/footling breech presentation).

To position himself for the journey through the birth canal, your baby will move lower down so that his presenting part, usually the head, will settle into your bony pelvis. This is known as engagement and you will experience it as a feeling of lightening.

Babies need a flexible skull, not only to fit through the birth canal, but also to allow room for growth. As your baby’s brain grows, his skull needs to be able to expand.

Assess the baby's position, whether head-first (vertex) or bottom-first (breech), and determine how far the baby has moved down the birth canal (station).
Gently push on the baby's head with one finger. If the head can be pushed back, the baby is still floating (ballotable).

For example, you may need a c-section if your baby is too big to pass through the birth canal, or if the baby is in a breech position (feet first) or a transverse position (shoulder first). The best position for your baby is head first.

breech birth - when the baby does not come into the birth canal in the typical position (head down)- the breech baby comes into the pelvis with the feet or buttocks presenting first.

Most babies are born with an abnormally shaped head from their travel during the birth canal. The skull is formidable at this point and can change to accommodate its' surroundings. This is good for labor, but not necessarily good for baby as he gets older.

Climbing stairs slowly will be even better but slowly without risk to properly align the baby with the birth canal. Try avoiding swimming or getting into a bath so that you may become buoyant. Making use of gravity to align the baby to the uterus is a clever method.

They may be too big to come down the birth canal or their shoulders may end up getting stuck (shoulder dystocia) and that may cause issues with nerve damage in the child. Some hospitals consider a child weighing over 9 lbs to be macrosomic and some use the older 10 pound guidelines.

Bleeding from the birth canal before 20 weeks is called a threatened abortion or miscarriage. The bleeding may or may not have abdominal pain associated with it. The blood loss may be brown spotting, blood stained discharge or bright red bleeding.

This is, in part, because an infant who arrives feet- or butt-first can get his head stuck in the birth canal.

If you imagine that this is the birth canal [points to the area between the tip of the thumb and the tip of the first finger] and here's the anal sphincter [draws a spot with a pen on hand at the point where the thumb and first finger joint meet].

Slipping Through the Birth Canal
In the last weeks of pregnancy, the baby typically moves into a vertex or head-down position, where he remains until birth.

Vagina - the female organ of sexual intercourse; the birth canal Vaginitis - inflammation of the vagina Varicocele - varicose veins in the scrotum Vas deferens - the tubes that connect sperm and testicular fluid to the ejaculatory ducts Vasectomy - surgical sterilization of ...

If your baby needs help traveling down the birth canal, your doctor may use either forceps or vacuum extraction. Forceps look like a large pair of salad tongs. they will be inserted into your vagina, and your doctor will help the baby out as you push.

The need for use of forceps or vacuum extraction to assist the baby through the birth canal appeared later in the after group than in the before group. Dr. Zhang explained that, in the before group, these extraction procedures were more often used when the baby was higher up in the birth canal.

Your cervix stops dilating and the baby is unable to move through the birth canal
The umbilical cord slips through your cervix
Your placenta starts separating from the uterine wall, which may block the baby's oxygen supply ...

If your baby grows very large, there is an increased risk of him getting stuck in the birth canal, which can result in Shoulder Dystocia or Erb's palsy. This means the Caesarean section rate is about 67% in diabetic mothers.

Both these positions allow the baby to flow more easily out the birth canal with minimal pressure on the perineal muscle.

Breech presentation: Position of the fetus where the bottom or legs are directed toward the birth canal. A Complete Breech Presentation means the baby’s buttocks are presenting at the cervix, but the legs are crossed or folded “Indian style,' making vaginal delivery impossible.

Forceps and vacuum extraction devices are often used to "pull" a baby out of the birth canal. These devices and the procedures that accompany them are notorious for large episiotomies and massive tears with major repair work having to be performed.

This is the best position because the baby's head is the largest and firmest part of the body to pass through the birth canal. As the head exits the body, it stretches the cervix, making it easier for the rest of the body to follow.

The level of the presenting part in the birth canal in relation to the ischial spines of the pelvis. The spines represent 0 station. The presenting part is described as being from -1 to -5 cm above the spines or +1 to+ 5 cm below the spines.

The part of the fetus that enters the birth canal first. Some presentations include variations of cephalic (head), breech (bottom, legs or feet) or shoulder.
Preterm
Premature or pre-term labor is defined as labor occurring after 20 weeks and before 37 completed weeks of pregnancy.

You may literally breathe easier these days if the baby's head has gradually dropped into position and shifted into the birth canal, giving your organs some room. This phenomenon is called lightening, and it may happen a few weeks before labor begins, right before, or even during labor.

Your uterus beings involuntary muscle contractions that help your baby descent through the birth canal and out into the world. A few well-timed pushes will speed things up at the end. If you can just control yourself through the contractions, you can easily survive a natural childbirth.

During transition, your baby has begun to moved down the birth canal. When transition is complete you are ready to begin the pushing stage of labor that will deliver your baby.

Forceps - Special instrument placed around the baby's head, inside the birth canal, to help guide the baby out of the birth canal during delivery.
Frank breech - Baby presenting buttocks first. Legs are flexed and knees extended.
Fraternal twins - See dizygotic twins.

Scientists once suspected that newborns developed their bacterial colony only at birth, in passing through the vaginal birth canal, but after taking a closer look at the types of bacteria in a baby's digestive tract versus a mother's vaginal, they discovered that they weren't really similar.

Where the umbilical cord comes down into the birth canal (vagina) before the baby's head or other presenting part, like the baby's bottom if the baby is breech.
This is a true obstetrical emergency, often requiring an emergency cesarean section for a safe birth.

Pelvimetry: Evaluation of the size of the birth canal or pelvis. Performed by X-ray.
Petit mal seizure: Attack of a brief nature with possible short impairment of consciousness. Often associated with blinking or flickering of the eyelids and a mild twitching of the mouth.

Face presentation: Baby comes into the birth canal face first.
Fallopian tube: Tube that leads from the cavity of the uterus to the area of the ovary. Also called uterine tube.
False labour: Tightening of uterus without dilatation of the cervix.

Keeping upright and moving around during the first stage of labour is thought to make labour more efficient as you work with gravity to encourage your baby down into the birth canal.

Vaginal birth - Birth of a baby through the birth canal
Vaginal birth after cesarean (VBAC) - Birth of a baby through the vagina after a previous cesarean birth
Varicella - Also known as chickenpox, it is a viral infection characterized by a rash of red spots all over the body ...

Being 10cms means that your cervix has opened to a point that will allow safe passage of your baby through your birth canal. With the help of your contractions and with you pushing.

Cervical Canal -- the birth canal.
Chorion -- One of the fetal membranes. It surrounds the fetus and is outside the amnion. By approximately 16 weeks, the amnion fuses to the chorion to form a unified double membrane, the "chorio-amniotic" membrane.

Umbilical cord prolapse refers to when the umbilical cord drops down into the birth canal. This page of the eMedTV website explains umbilical cord prolapse in detail, including how it can cause complications during delivery.
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Carenatal DHA ...

Vagina - the female organ of sexual intercourse; the birth canal.
Vaginismus
Vaginismus - a spasm of the muscles around the opening of the vagina, making penetration during sexual intercourse either impossible or very painful. Can be caused by physical or psychological conditions.

With four weeks to go, our baby is almost ready. S/he could drop into the birth canal at any time now. This week, the fat is dimpling on the elbows and knees as well as forming creases in the neck and wrists. The baby's gums are very rigid.

Pelvic measurements. -Measurements made by the doctor of the size of the birth canal.
Pelvic organs. -The organs of a woman's body which are in the hollow of the pelvic bones. These are the uterus, vagina, ovaries, Fallopian tubes, bladder, and rectum.

Vagina: The female organ of sexual intercourse and also the birth canal.
Zona Pellucida: The protective coating around the egg and early embryo.
Zygote: The term for a fertilized egg prior to it being an embryo.

Now, while the odds in general are favorable, fibroids can cause some complications, such as preterm contractions, preterm labor, and blockage of the birth canal, requiring a Cesarean section.

Contractions are caused by your womb tightening and relaxing
They help to push your baby down into the birth canal
Time your contractions as soon as they start
The Bounty Pregnancy Diary App has a handy contraction timer to plot your labour ...

In the second stage the mother pushes the baby out through the birth canal and in the final stage the placenta is removed. If a Cesarean delivery is necessary, the baby is delivered through a surgical incision made through the abdominal wall and then through the uterus.

If it is deeply engaged in the pelvis, it is basically impossible for a placenta previa to be present because there is not enough room in the birth canal for both the fetal head and a placenta previa.

If you have an infection when you go into labor, there's some chance that your newborn will contract it as he passes through the birth canal. Yeast may cause a common infection called thrush, which is recognizable by white patches in a baby's mouth.

breech birth - an abnormal delivery presentation in which the baby's feet, knees, or buttocks come into the birth canal first, before the baby's head.
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Uterus: Muscular organ of gestation; consists of a pear-shaped fundus which is the top or uppermost portion,, and a narrower lower portion called the cervix. The cervix resembles a "neck" until the time of birth when it opens into the birth canal (or vagina) to allow passage of the baby.

Uterine contraction: A rhythmic tightening in labor of the upper uterine musculature that contracts the size of the uterus and pushes the fetus toward the birth canal.
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The contractions thin (efface) and spread (dilate) the opening of the uterus (the cervix) that leads into the birth canal (vagina). The first stage is over when the cervix is completely ready 10 centimeters dilated and 100% effaced.

Your baby will move down with each contraction. The three separate soft bones of his head will temporarily overlap so he can pass through the snug birth canal.

Take heart, there are some excellent positions for labour you can try which not only help your cervix to dilate during contractions but will also encourage the baby to move down the birth canal when the time comes.

Your baby's skeleton is hardening. The bones in his head have not yet fused together, which will allow them to slightly overlap as his head passes through the snug space of the birth canal.

Vaginal bleeding can also happen when you are in labor. A plug blocks the cervix of the uterus or the mouth of the uterus in order to protect the baby from catching an infection. Once the plug is gone, your baby can move into the birth canal and labor can happen anytime.
Cervix Dilation ...

Weeks 33 and 34
Your baby weighs between 4 ½ and 5 pounds and is more than a foot long. Its crown to toe length is almost 19 ½ inches. The baby may drop soon, which means that the baby's head enters the birth canal.

Can cause conjunctivitis, blindness, and serious generalized infection in the baby delivered through an infected birth canal. Drops of silver nitrate or an antibiotic ointment can be squeezed into the eyes of the newborn at birth as an extra precaution if the mother has had gonorrhea.

See also: See also: Pregnancy, Delivery, Pregnant, Vagina, Uterus

Pregnancy & Parenting  Biphasic  Birth center

 
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