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NEET UG 2026 » NEET UG Study Material » Biology » Nondeciduate
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Nondeciduate

Know about Nondeciduate. The fundal-posterior posture extends from the top of the womb to the back. If your placenta is in this position, the baby will continue to be nourished until you have symptoms. Symptoms include bleeding, severe back pain, and stomach discomfort.

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One of the four types of Placenta is the Nondeciduate one. In typical placental delivery, because the placenta is located on the uterine back wall, the baby’s movements and kicks are felt earlier and stronger. Furthermore, the posterior placenta is regarded to be the best for the kid since it allows the baby to develop and descend into the birth canal, allowing for a vaginal birth.

Generalized Placenta Formation

A mammalian embryo is transported to the uterus at the blastocyst stage. This blastocyst is composed of an epithelial cell layer on the surface and an embryonal cell mass on the inside. This epithelial layer, which absorbs nutrients, absorbs uterine fluid. Because it absorbs nutrition, this layer is known as the trophoblast. Chorionic villi are fingerlike extensions of the chorion that grow during embryonic development. Later, connective tissue and blood vessels extend it. This will gradually enter the uterine endometrium, sucking nourishment from the mother’s blood. The endometrium of the uterus is made up of epithelium, connective structures, blood vessels, and nerves. The endometrium and uterus are inseparably linked.

Non-deciduous placenta

  •  A non-deciduous placenta has chorionic villi that are loosely linked to the uterine endometrium and may be easily detached from the endometrium without bleeding blood.
  • The discovery’s location. Pigs, cows, buffaloes, goats, and other animals have nondeciduate placentas.
  • Epitheliochorial placenta

The placenta is called epithelio-chorial because it comes into contact with the uterine epithelium. Between the foetal and maternal components, there are six levels. The uterine epithelium folds to form pockets, and chorionic villi reside within these pockets. If all six layers or barriers are present, the placenta is referred to as an epithelio-chorial placenta.

  • Syndesmochorial placenta

The foetal and maternal components are so tightly linked that the uterine epithelium is damaged, enabling the chorion to come into contact with the connective tissue of the uterine mucosa. As a result, the uterine wall’s epithelium has been lost, and chorionic villi have grown up to the mother’s uterine wall’s connective tissue. In other words, the allantoin-chorionic villi penetrate the mother’s uterus, bringing the chorion into contact with the syndesmosis of the mother’s uterus. There are just five barriers or tissues that separate the two bloodstreams. This form of the placenta is known as a syndesmotic-chorial placenta. As a result, it is referred to as the syndesmochorial placenta.

  • Endothelio-chorial placenta

In this kind of placenta, the uterine mucosa is also reduced, and the chorionic epithelium comes into contact with the endothelial walls of the maternal (uterine) blood vessels. The endothelium of the mother’s uterus will come into contact with the foetal chorion, giving birth to the phrase endothelio-chorial placenta. In this case, there are just four barriers between the foetal and maternal bloodstreams. This form of the placenta is known as an endothelio-chorial placenta.

  • Haemochorial placenta

In this kind of placenta, the endothelial walls of maternal blood arteries dissolve as well, and the chorionic epithelium is bathed directly in maternal blood sinuses. The chorionic villi are surrounded by endothelial-free spaces through which maternal blood enters and departs via the uterine arteries and veins. The link between the placenta and the mother is stronger. The foetal chorion will float in the blood pools of the mother’s uterus. As a result, it’s referred to as the haemochorial placenta.

  • Haemo-Endothelial Placenta

In most regions, the chorionic villi have lost so much of their epithelium and connective tissue layers that only the bare endothelium lining of their blood arteries separates the foetal blood from the maternal blood sinuses. The foetal blood arteries quickly enter the mother’s blood lacunae.

Non-Deciduate Placenta Diagram

Non-deciduate placenta diagram will help you understand better foetal implantation. The chorionic epithelium is in touch with the uterine epithelium, and at the moment of delivery, the foetal villi are entirely dragged out without ripping or injuring the uterine wall, and no bleeding ensues.

What Happens When the Placenta is Not Removed?

Want to know what happens when the placenta is not removed? If your placenta is not delivered, it may cause a haemorrhage, which can be deadly. Infection. If the placenta or placental pieces remain in your uterus, you are at risk of acquiring an infection. If you have a retained placenta or membrane, you should see your doctor as soon as possible.

Conclusion 

An anterior placenta connects to the front (towards the mother’s belly), whereas a fundal or posterior placenta attaches to the back (towards the mother’s spine). Placentas that attach to the uterine side are referred to as lateral placentas. The fundal height is the distance between the top of your uterus and your pubic bone. Healthcare providers use it to check if your baby’s growth is on pace. Your fundal height is measured beginning at 20 weeks of pregnancy.

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Frequently asked questions

Get answers to the most common queries related to the NEET UG Examination Preparation.

What do you understand by non-deciduous placenta?

Ans : Non-Deciduous Placenta or Semi-Deciduous Placenta: The implantation in the non-deciduous plac...Read full

What is the Cotyledonary placenta?

Ans : Patches of allantochorion engage with endometrium to form cotyledons, which are multiple sepa...Read full

What is the best placenta position in pregnancy?

Ans : The top part of the uterine back wall is one of the best places for the baby to be. It allows...Read full

Is a Fundal placenta normal?

Ans : The fundal placenta position is frequent and low-risk, which means it has no difficulties on ...Read full

What is the abnormal placenta?

Ans : The placenta usually connects to the top or side of the uterus. The placenta can form in the ...Read full

Ans : Non-Deciduous Placenta or Semi-Deciduous Placenta: The implantation in the non-deciduous placenta is shallow. The blastocysts are discovered in the uterine cavity in the majority of mammals.

Ans : Patches of allantochorion engage with endometrium to form cotyledons, which are multiple separate attachment locations. The foetal portions of this type of placenta are termed cotyledons, the maternal contact sites are called caruncles, and the cotyledon-caruncle complex is called a placenta.

Ans : The top part of the uterine back wall is one of the best places for the baby to be. It allows them to move into the anterior position just before birth. Furthermore, the presence of a posterior placenta does not affect the fetus’s growth and development.

Ans : The fundal placenta position is frequent and low-risk, which means it has no difficulties on its own. The status of a fundal placenta must be monitored, just like any other placental region, to ensure that it is giving your baby the support they require, and this will be done during any standard pregnancy ultrasound.

Ans : The placenta usually connects to the top or side of the uterus. The placenta can form in the incorrect place or attach itself too deeply to the uterine wall in rare situations. Placenta previa, placenta accrete, placenta increta, and placenta percreta are all terms for placental diseases.

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