Placenta Sentence Examples
The ovary contains one or more ovules borne on a placenta, which is generally some part of the ovary-wall.
The placenta is discoidal and deciduate.
The ovule appears at first as a small cellular projection from the placenta.
More remarkable still is the development of a small allantoic placenta.
There are five, or sometimes fewer, carpels, which unite to form an ovary with as many chambers, in each of which are one or two, rarely more, pendulous anatropous ovules, attached to the central column in such a way that the micropyle points outwards and the raphe is turned towards the placenta.Advertisement
The developing embryo at the end of the suspensor grows out to a varying extent into the forming endosperm, from which by surface absorption it derives good material for growth; at the same time the suspensor plays a direct part as a carrier of nutrition, and may even develop, where perhaps no endosperm is formed, special absorptive "suspensor roots" which invest the developing embryo, or pass out into the body and coats of the ovule, or even into the placenta.
The surface of the chorion is covered evenly with minute villi, constituting a diffuse non-deciduate placenta.
It consists essentially of two parts, a basal portion forming a chamber, the ovary, containing the ovules attached to a part called the placenta, and an upper receptive portion, the stigma, which is either seated on the ovary (sessile), as in the tulip and poppy, or is elevated on a stalk called the style, interposed between the ovary and stigma.
The ovules are attached to the placenta, which consists of a mass of cellular tissue, through which the nourishing vessels pass to the ovule.
In marginal placentation the part of the carpel bearing the placenta is the inner or ventral suture, corresponding to the margin of the folded carpellary leaf, while the outer or dorsal suture corresponds to the midrib of the carpellary leaf.Advertisement
When the pistil is formed by one carpel the inner margins unite and form usually a common marginal placenta, which may extend FIG.
The ovules (o) are attached to a central placenta, formed by the union of the five ventral sutures.
In these instances the placentas may be formed at the margin of the united contiguous leaves, so as to appear single, or the margins may not be united, each developing a placenta.
I, Vertical; 2, horizontal section; c, calyx; d, wall of ovary; o, ovules; p, placenta; s, stigma.
The ovules (o) are attached to a free central placenta, which has no connexion with the walls of the ovary.Advertisement
In Caryophyllaceae, however, while the placenta is free in the centre, there are often traces found at the base of the ovary of the remains of septa, as if rupture had taken place, and, in rare instances, ovules are found on the margins of the carpels.
But in Primulaceae no vestiges of septa or marginal ovules can be perceived at any period of growth; the placenta is always free, and rises in the centre of the ovary.
The stigma is the termination of the conducting tissue of the style, and is usually in direct communication with the placenta.
The ovule is attached to the placenta, and destined to become the seed.
Using ultrasound to guide the way, a needle is inserted through the mother's abdomen into the developing placenta.Advertisement
I had a really traumatic birth, he was born 2 mths early by emergency c-section due to me having a placenta abruption.
She has been admitted to Flagler Hospital in St. Augustine, FL with possible placenta abruption.
About ten minutes later I was having strong afterpains and feeling very uncomfortable and I wanted to try getting the placenta out.
A Cesarean birth was planned when placenta previa was discovered at 32 weeks.
Caesareane of placenta accreta is much higher in women with a prior cesarean, than otherwise.Advertisement
Once routinely discarded along with the placenta and considered a waste product, it has been used in more than 6,000 transplants worldwide.
The placenta generally comes away easily, and a little massage of the uterine fundus stops further bleeding.
There was no suggestion on the scan that the placenta had separated. IV.
However, the disease can cross the placenta causing the more severe neonatal listeriosis in the fetus.
Barbiturates readily cross the placental barrier and are distributed throughout fetal tissues with highest concentrations in placenta, fetal liver and brain.
In contrast to the alkaline phosphatase, the GGT tends not to be elevated in diseases of bone, placenta, or intestine.
Neonatal immunity In Humans, maternal IgG can cross the placenta.
Karen had a natural third stage with her second baby, Lewie, after having had a retained placenta with her first baby.
I opted to deliver the placenta normally, which came out about an hour later.
Q. Can I labor with a low lying placenta?
A needle is used to take a sample of the cells that will form the placenta.
Stages of labor Q. What causes a retained placenta?
In the case of the human placenta, the evidence seems to be more equivocal.
Foals born at less than 300 days with a normal placenta are highly unlikely to survive.
An abrupted placenta meant I had my baby by emergency cesarean early -- at 35 weeks.
This may happen if you have a small or unusual shaped uterus, a fibroid or low-lying placenta.
Diagnostic tests Chorionic villus sampling This means taking a sample of a piece of tissue from the placenta.
The bandicoots alone possess a placenta.
This is often coloured, is of a denser texture than the surrounding tissue, and is traversed by fibrovascular bundles, which pass from the placenta to nourish the ovule.
In pregnancy, harmful substances in the mother 's body may cross the placenta to affect the unborn baby.
When your uterus contracts, it cuts off the oxygen supply to your placenta.
Your doctor may instruct you to push one more time as he pulls the placenta out of your body.
After your baby is delivered, he will also pull out the placenta.
Potential for the Twin-Twin Transfusion Syndrome where the shared placenta contains abnormal blood vessels affecting the babies' ability to get necessary resources from the mother.
Identical twins don't always share the same placenta, although if the egg splits after the first week they probably do.
One way is to determine if the babies are sharing one placenta.
Breathing is a considerable concern in baby health issues.Before birth, babies receive nutrition and oxygen through the placenta.
The kitten, and then the placenta will be expelled.
It may take another set of contractions for the placenta to come out, and the kitten will remain attached via the umbilical cords.
A woman who smokes during her pregnancy passes nicotine to her fetus and cuts oxygen flow to the placenta by 25%.
Women who smoke are much more likely to face serious pregnancy complications such as placenta previa and placental abruption.
So it goes until each puppy and its placenta has been delivered.
The disease is transmittable from mother to child as the protozoa will cross the placenta and infect the fetus.
During pregnancy prolactin helps to increase breast mass but does not cause lactation because it is inhibited by the hormone progesterone, which is made by the placenta.
The inhibiting influence of progesterone is so strong that lactation is delayed if any of the placenta is retained after birth.
The placenta is attached to the wall of the uterus and leads to the unborn baby via the umbilical cord.
The third stage is delivery of the placenta or afterbirth.
In the final stage of labor, the placenta is expelled by the continuing uterine contractions.
The placenta is pancake shaped and about 10 cm (25 cm) in diameter.
Generally, there is a rise in the uterus due to a contraction and a gush of blood as the placenta is expelled.
The placenta should be examined to make sure it is intact.
Retained placenta can cause severe uterine bleeding after delivery, and it must be removed.
This is only successful approximately half the time, and there are possible complications with the procedure, such as umbilical cord entanglement and separation of the placenta.
Narcotics cross the placenta and can affect the baby.
The infection is carried to the infant through the mother's placenta and can cause impairment of the infant's eyes (opthalmic impairment) and central nervous system (neurological dysfunction).
Characteristically, with fraternal twins, each has its own placenta and amniotic sac.
About 30 percent of identical twins have this classification, and each twin has its own chorion, amnion, and placenta.
The placenta has one chorion and two amnions, so each twin has its own amniotic sac.
Following the birth of multiples, the placenta is carefully examined to determine if they are fraternal or identical.
The villi establish a physical connection with the wall of the uterus and eventually develop into the placenta.
With systemic autoimmune diseases or vasculitis, the mother's blood circulation can be impaired and thus the ability to supply oxygen and nutrients to the baby through the placenta is affected.
Since chronic hypertension or pregnancy-induced hypertension (preeclampsia, eclampsia) similarly affect blood circulation to the placenta, women with these problems are also at risk for IUGR.
Insulin requirements vary tremendously during pregnancy due to placenta hormones that may inhibit the action of insulin.
The classical incision provides a larger opening than a low transverse incision and is used in emergency situations, such as placenta previa, preterm and macrosomic fetuses, abnormal presentation, and multiple births.
The placenta is removed from the mother and her uterus is closed with suture.
Placenta previa-A condition in which the placenta totally or partially covers the cervix, preventing vaginal delivery.
Normally, the baby is born first and then the placenta is delivered within a half hour.
It can only be tried if there is one fetus in the uterus, if the placenta is not lying in front of the fetus, and if the umbilical cord does not appear to be wrapped around the fetus at any point.
Possible causes that center on the fetus rather than the mother include chromosomal abnormalities, genetic and other syndromes that impair skeletal growth, and defects of the placenta or umbilical cord.
Structural abnormalities of the placenta, premature detachment of the placenta from the uterine wall (abruption), and placental infections (chorioamnionitis) are thought to pose some risk for CP.
Infection in the mother is sometimes not passed to the fetus through the placenta but is transmitted to the baby during delivery.
When a woman is already pregnant, tests can be performed on either the cells of the fetus (amniocentesis) or the placenta (chorionic villus sampling) to determine whether the baby will have Tay-Sachs disease.
If the two fetuses have separate amniotic sacs, they can either share a placenta or have two separate placentas.
Up to 15 percent of twins who share a placenta (monochorionic twins) have twin-twin transfusion syndrome (TTTS).
Because of abnormal blood vessel connections in the placenta, one twin pumps the circulating blood for both twins.
If this fails, prenatal surgery may be used to destroy the abnormal blood vessel connections in the placenta.
The fetus must be moved away from the placenta, the disk-shaped organ within the uterus that provides the blood supply to the fetus.
The first incision is made at a point away from the placenta to prevent damaging it.
The fetus is removed from the womb by cesarean section but the umbilical cord is left intact so that the mother's placenta continues to sustain the fetus.
A major risk of prenatal surgery is nicking the placenta, causing blood hemorrhaging, uterine contractions, and birth of a premature infant who may not survive.
Alcohol is readily absorbed from the gastrointestinal tract into a pregnant woman's bloodstream and circulates to the fetus by crossing the placenta.
One end of the umbilical cord is attached to the placenta and the other end is attached to the baby's belly button (umbilicus).
In general, most physicians believe that IUGR is the consequence of a disease process within one or more of the three partitions that maintain and regulate fetal growth, i.e., the maternal compartment, the placenta, or the fetus.
The grading of the placenta indicates whether it may be inappropriately aging, but this is not as accurate as fetal measurements.
The use of baby aspirin therapy remains controversial but theoretically it serves to preserve or improve blood flow to the placenta.
Circumvallate placenta-The existence of a thick, round, white, opaque ring around the periphery of the placenta that limits the expansion of the fetal vessels.
Placental infarction-An area of dead tissue in the placenta that is due to an obstruction of circulation in the area.
Uteroplacental insufficiency-Designates the lack of blood flow from the uterus to the placenta, resulting in decreased nourishment and oxygen to the fetus.
The placenta, heart, liver, spleen, and adrenal glands may all become enlarged.
It involves removing a sample of the placenta and testing the cells.
If the uterus is not relaxing or if the resting tone is rising, this can be an indication of a placental abruption (the tearing away of the placenta from the wall of the uterus).
Problems could also occur if the electrode or IUPC causes trauma to the eye, fetal vessels, umbilical cord, or placenta.
A baby who is receiving sufficient oxygen through the placenta moves around and the monitor strip will show the baby's heart rate rising briefly as he or she moves.
During a contraction, the flow of oxygen (from the mother) through the placenta (to the baby) is temporarily blocked.
Deceleration-A decrease in the fetal heart rate that can indicate inadequate blood flow through the placenta.
Chorionic villus sampling is a procedure that obtains a sampling of cells from the placenta for testing.
If an inadequate supply of oxygen from the placenta is detected during labor, the infant is at high risk for asphyxia, and an emergency delivery may be attempted either using forceps or by cesarean section.
Testing can be done at 10-12 weeks gestation by a procedure called chorionic villus sampling (CVS) that involves removing a tiny piece of the placenta and analyzing DNA from its cells.
The stem cells used for transplantation are taken from blood collected from a baby's umbilical cord or the placenta (afterbirth) immediately following delivery.
Cord blood-The blood that remains in the umbilical cord and placenta after birth.
Amniocentesis is a method of withdrawing amniotic fluid from the placenta to allow examination of fetal cell DNA shed into the amniotic fluid, helping to identify genetic mutations.
Hormonal changes within the mother during pregnancy result in increased ligament looseness or laxity and are thought to possibly cross over the placenta and cause the baby to have lax ligaments while still in the womb.
An unusually small placenta may be noted during the birth of the child.
Chorionic villus sampling is a procedure done early in pregnancy (approximately 10-12 weeks) to obtain a small sample of the placenta for testing.
Rubella infection during early pregnancy can pass through the placenta to the developing infant and cause serious birth defects, including heart abnormalities, mental retardation, blindness, and deafness.
Syphilis is a sexually transmitted bacterial infection that can be transferred from a mother to an infant through the placenta before birth.
Since oxygen and nutrients are received from the placenta and the umbilical cord instead of the lungs, the ductus arteriosus acts as a "short cut" that allows blood to bypass the deflated lungs and go straight out to the body.
The testing results reflect how well the placenta is functioning in its ability to adequately supply blood and, therefore, oxygen to the fetus.
A normal pregnancy is 40 weeks and testing should begin at 41 weeks to assess the status of the placenta, which may no longer be capable of meeting the baby's needs.
If a fetus is not receiving adequate oxygen from the placenta, the FHR will not accelerate, but if the oxygen supply is sufficient, accelerations will be noted.
If delivery cannot be delayed, the mother may be given a steroid hormone, similar to a natural substance produced in the body, which crosses the barrier of the placenta and helps the fetal lungs to produce surfactant.
The digestive tract is unnecessary for fetal growth, since all nutrition comes from the mother through the placenta and umbilical cord.
The test involves taking a small sample of cells from the placenta with a needle through the abdominal wall or a small tube (catheter) through the cervix.
Red blood cells (RBCs) from the fetus leak across the placenta and enter the woman's circulation throughout pregnancy with the greatest transfer occurring at delivery.
In succeeding pregnancies, the antibodies reach the fetus via the placenta and destroy (lyse) the fetal RBCs.
Both diseases have similar symptoms, but Rh disease is much more severe, because anti-Rh antibodies cross over the placenta more readily than anti-A or anti-B antibodies.
The placenta should not be removed manually to avoid squeezing fetal cells into the maternal circulation.
Transplacental-Passing through or occurring across the placenta.
It is a hormone produced by the placenta during pregnancy.
Smoking while pregnant is a bad idea because expectant mothers pass the nicotine and carbon monoxide from cigarettes on to the baby through the placenta.
The day the egg splits determines whether your twins will have one large placenta they share with two umbilical cords or two separate placentas.
Cord blood is blood left in the umbilical cord and the placenta after a baby is born.
While the baby is still inside the mother's uterus, oxygen and nutrients are transferred from the mother's blood to the baby's through the placenta.
The baby's blood circulates through the placenta, picking up the oxygen and nutrients.
After the baby is born, the placenta separates from the wall of the uterus and is expelled.
Once the baby is born, he no longer needs the placenta.
Cutting the umbilical cord separates the baby from the placenta.
Some of the baby's blood is left in the placenta and in the cord itself.
Usually, the doctor or midwife will simply dispose of the placenta and cord.
The umbilical cord and placenta are normally discarded after the birth.
The only thing that's different, if you're donating or banking, is that the placenta and cord will be saved so that the blood can be stored.
After the baby is born and the umbilical cord is cut, the cord and placenta will be saved so that the blood can be drained and stored.
During pregnancy spotting may be also be sign of a placental problem such as placenta previa (when the placenta covers the cervix) or a placental abruption (when the placenta disenganges prematurely).
The final stage of giving birth is the delivery of the placenta.
The placenta is a bundle of tissue and blood vessels that helped support the baby while he/she was in your body.
After the baby is born and the cord is cut, the placenta gradually detaches from the uterus and is expelled from your body.
Placenta previa occurs when the placenta partially or completely covers the cervix.
When you get your ultrasound, the technician will look for placenta placement.
The most common symptom of placenta previa is bleeding.
If your placenta completely covers the cervix, you will be asked to deliver via cesarean.
At this time, a layer of cells is also forming in the uterus, which will become the placenta and will give the baby nutrition.
Keep in mind that alcohol crosses the placenta.
For instance, as the placenta ages it becomes more inefficient and a baby receives less nutrients.
Studies show that if a woman is overdue and her baby is far less active than usual, it's a good sign that the placenta is aging.
Because lupus antibodies can cross the placenta to the fetus, the baby may experience a low white blood cell count, anemia, or a slow heartbeat.
Medications do cross the placenta and almost no medications have been proven 100 percent safe in relation to fetal development.
The ectopic pregnancy is possible because the medical team placed the placenta and embryo into the man's abdominal cavity.
After conception, the pregnancy hormone hCG (Human Chorionic Gonadotropin) secretes from the developing placenta after the egg implants in the uterine lining.
The abruption occurs when the placenta separates from the wall of the uterus.
After the baby is born, the placenta has to be removed.
In normal situations, the mother feels contractions and the placenta is removed with the help of a nurse, doctor, or other birthing specialist.
The placenta is a sac filled with blood and other fluids.
Your baby may be premature or you may suffer from a serious condition such as placenta previa.
When the cervix is fully dilated, a long plastic tube connected to a suction device is inserted into the uterus to remove the fetus and placenta.
Some of the reasons are indeed cause for considerable concern, such as miscarriage, ectopic pregnancy, or a placenta that has detached later on in pregnancy.
The lining that was developed leading up to ovulation and implantation continues to grow and remains intact, becoming part of the placenta.
While the baby is already delivered during stage two, the placenta is delivered during stage three.
During stage three you are relaxing, possibly holding your baby in your arms, while the doctors and nurses are massaging your abdomen so the uterus will expel the placenta.
Caffeine passes through the placenta so it has an effect on the baby.
Caffeine can reduce blood flow to the placenta as well.
The fact that methadone goes through the placenta and reaches the baby is very distressing for expectant moms in treatment.
During pregnancy, the release of HCG lets the body know that it needs to begin moving fat and other nutrients into the placenta.
As a rule there is no allantoic placenta forming the means of communication between the blood of the parent and the foetus, and when such a structure does occur its development is incomplete.
Finally, there is the hypothesis that marsupials are the descendants of placentals, in which case, as was suggested by its discoverer, the placenta of the bandicoots would be a true vestigial structure.
Placenta diffused or cotyledonary.
Modification of placenta from simple diffused to cotyledonary form.
In Casuarina, Juglans and the order Corylaceae, the pollen-tube does not enter by means of the micropyle, but passing down the ovary wall and through the placenta, enters at the chalazal end of the ovule.
The placenta is diffuse, not cotyledonary.
The superior ovary - half-inferior in Samolus - bears a simple style ending in a capitate entire stigma, and contains a free-central placenta bearing generally a large number of ovules, which are exceptional in the group Gamopetalae in having two integuments.
While most of the species are of interest chiefly to the conchologist, there are a number of edible forms. The shells of Placuna placenta, L., split into thin flat plates and, cut into small squares, are almost universally used in place of window glass.
In Araucaria the cone-scale is regarded as consisting of a flat carpel, of which the placenta has not grown out into the scale-like structure.
As the placenta is formed on each margin of the carpel it is essentially double.
In Leontice thalictroides (Blue Cohosh), species of Ophiopogon, Peliosanthes and Stateria, the ovary ruptures immediately after flowering, and the ovules are exposed; and in species of Cuphea the placenta ultimately bursts through the ovary and corolla, and becomes erect, bearing the exposed ovules.
The part by which the ovule is attached to the placenta or cord is its base or hilum, the opposite extremity being its apex.
The ovule is sometimes embedded in the placenta, as in Hydnora.
When the ovule is so developed that the chalaza is at the hilum (next the placenta), and the micropyle is at the opposite extremity, there being a short funicle, the ovule is orthotropous.
When there is a single ovule, with its axis vertical, it may be attached to the placenta at the base of the ovary (basal placenta), and is then erect, as in Polygonaceae and Compositae; or it may be inserted a little above the base, on a parietal placenta, with its apex upwards, and then is ascending, as in Parietaria.
It may hang from an apicilar placenta at the summit of the ovary, its apex being directed downwards, and is inverted or pendulous, as in Hippuris vulgaris; or from a parietal placenta near the summit, and then is suspended, as in Daphne Mezereum, Polygalaceae and Euphorbiaceae.
Sometimes a long funicle arises from a basal placenta, reaches the summit of the ovary, and there bending over suspends the ovule, as in Armeria (sea-pink); at other times the hilum appears to be in the middle, and the ovule becomes horizontal.
When the ovules are very numerous (indefinite), while at the same time the placenta is not much developed, their position exhibits great variation, some being directed upwards, others downwards, others transversely; and their form is altered by pressure into various polyhedral shapes.
These data show that placental Igf2 regulates the development of the diffusional exchange characteristics of the mouse placenta.
In pregnancy, harmful substances in the mother's body may cross the placenta to affect the unborn baby.
A pregnant woman with infectious syphilis can pass the infection to her fetus via the placenta or during birth.
Molar disease expressed P2Y6 in the villous trophoblast but not in the proliferative intermediate trophoblast, recapitulating the pattern of first-trimester placenta.
It is urged that the imperfect placenta of the bandicoots instead of being vestigial, may be an instance of parallelism, and that in marsupials generally the allantois failed to form a placental connexion.
The stomach is simple, the caecum large and capacious, the placenta diffused, and the teats inguinal.
The stomach is simple or somewhat complex, and the placenta diffused.
Malformations of the pelvis, accidental injuries and the diseases and displacements to which the uterus is liable, on the one hand; and, on the other, various morbid conditions of the ovum or placenta leading to the death of the foetus, are among the direct local causes.
When placed on the stigma, under favourable circumstances, the pollen-grain puts forth a pollen-tube which grows down the tissue of the style to the ovary, and makes its way along the placenta, guided by projections or hairs, to the mouth of an ovule.
The petaloid perianth consists of two series, each with three members, which are joined below into a longer or shorter tube, followed by one whorl of three stamens; the inferior ovary is three-celled and contains numerous ovules on an axile placenta; the style is branched and the branches are often petaloid.