Índice
Literatura científica selecionada sobre o tema "Placental anatomy"
Crie uma referência precisa em APA, MLA, Chicago, Harvard, e outros estilos
Consulte a lista de atuais artigos, livros, teses, anais de congressos e outras fontes científicas relevantes para o tema "Placental anatomy".
Ao lado de cada fonte na lista de referências, há um botão "Adicionar à bibliografia". Clique e geraremos automaticamente a citação bibliográfica do trabalho escolhido no estilo de citação de que você precisa: APA, MLA, Harvard, Chicago, Vancouver, etc.
Você também pode baixar o texto completo da publicação científica em formato .pdf e ler o resumo do trabalho online se estiver presente nos metadados.
Artigos de revistas sobre o assunto "Placental anatomy"
1
Hussain, Atif, Nazma Kiran, Nida Qasim Hayat, Sadaf Shaheen, Abdul Hafeez Baloch, and Abdul Rashid. "Compare the Histological Features between the Normal and Hypertensive Placenta." Pakistan Journal of Medical and Health Sciences 16, no. 3 (2022): 1193–95. http://dx.doi.org/10.53350/pjmhs221631193.
Texto completo da fonteResumo:
Objective: The purpose of the current research was to investigate the morphology and histology of placentas collected from moms who had PIH and to compare those results to placentas taken from women who had normal pregnancies. Study Design: The study was conducted at Anatomy department of Women Medical and Dental College Hospital Abbottabad and Mohi-ud-Din Islamic Medical College, Mirpur, AJK during the period from February 2021 to July 2021. Place and Duration: Observational/comparative study Methods: In this study total 80 pregnancies, 40 normal placenta’s and 40 hypertensive placenta’s were presented. At first, the physical aspects of placentas, also known as their morphological traits, were noted. In order to investigate the histology, pieces of each placenta measuring 5 millimetres in thickness were removed. After this, the tissue underwent further histological processing, after which it was fixed in formal saline at a concentration of 10 percent. It was noted down how much newborns weighed at birth. SPSS 23.0 was used to analyze complete data. Results: Placental weight, size, surface area and number of cotyledons were decreased in hypertensive placentas, whereas regions of infarction, retroplacental clot, and calcification were increased. Hyalinized villi and atherosclerosis have been reported in hypertensive placentas (p0.05). Foetal mortality and morbidity were closely linked to these alterations. We also found that among women with high blood pressure who had the aforementioned histological alterations in their placentas, the risk of foetal death and morbidity was higher. Conclusion: We concluded that, PIH reduces placenta weight and size. Changes in utero-placental blood flow may induce placental insufficiency. It affects newborn birth weight. PIH impacts placenta shape, histology, and foetal development. Keywords: Placenta, Pregnancy-induced hypertension, Histological, Morphological, Mortality, Morbidity
2
Begum, Nasrin, and Roxana Ferdousi. "Study of Gross Anatomy of Human Placenta in Pregnancy Induced Hypertension." Journal of Armed Forces Medical College, Bangladesh 10, no. 2 (2015): 55–61. http://dx.doi.org/10.3329/jafmc.v10i2.25923.
Texto completo da fonteResumo:
Introduction: Pregnancy induced hypertension (PIH), also referred to as Gestational hypertension is a condition of high blood pressure during pregnancy. Progression the disease causes preeclampsia and eclampsia, which are the commonest causes of maternal and fetal morbidity and mortality.Objective: The objectives of the study were to observe and measure the macroscopic changes in the placenta in pregnancy induced hypertension and to compare the placental findings of the control group. .Method: This descriptive observational study was carried out in the Department of Anatomy, Bangabandhu Sheikh Mujib Medical University (BSMMU). Forty placentas were collected from Bangladesh Institute of Research & Rehabilitation in Diabetes, Endocrine and Metabolic Disorders (BIRDEM) and Bangabandhu Sheikh Mujib Medical University. Out of forty placentas, twenty were from non-hypertensive mother considered as controls and twenty from PIH mothers. Mother who had Rh-negative blood group, positive for VDRL and HbsAg and mother delivered multiple babies or babies with any visible congenital malformation were excluded. All women included in the study gave birth to a live born baby after 35 weeks of gestation by caesarian section. The macroscopic features of placentas were recorded and after that specimen was fixed in 10% formol saline. After two week of fixation, a point counting method was used on placental slices for estimation of the volume of parenchyma and non-parenchyma.Results: The general features of the control and PIH mother were statistically matched. As compared with the control group, PIH group showed no statistically significant difference in values of placental weight, volume and diameter.Mean placental weight (gm), mean volume (ml) and the mean diameter (cm) of the placental, mean absolute volume of parenchyma, mean proportional and mean absolute volume of non-parenchyma were lower in PIH group than the control group. The mean number of cotyledon of the placenta and mean proportional volume of parenchyma were higher in PIH group than control group and. These differences did not reach statistically significant level.Conclusion: Several authors has concluded that the changes in the placenta in diabetic and toxaemic mother are the reflection of some compensatory mechanism, but the present study fails to identify any statistically significant changes in PIH group in favour of such statement.Journal of Armed Forces Medical College Bangladesh Vol.10(2) 2014
3
Falak Naz, Zainab Rehman, Shazia Iftikhar, Waqar Ahmed, Parkha Rehman, and Saeeda BiBi. "MORPHOMETRIC VARIATION OF PLACENTA AND UMBILICAL CORD INSERTION." Journal of Khyber College of Dentistry 11, no. 04 (2021): 32–34. http://dx.doi.org/10.33279/jkcd.v11i04.114.
Texto completo da fonteResumo:
Objective:
 To relate and appraise the morphological variationsof placenta and umbilical cord in normal pregnancy.
 Materials and Methods:
 The study included 100 placentas which were collected from GovernmentMaternity Hospital Hashtnagri and studied in the Anatomy department of Khyber Medical CollegePeshawar over one month duration. The morphological variations of placenta, like shape, weightand attachment of umbilical cord were noted and photographed.
 Results:
 In our study, we observed round placentas in 91 cases (91%), oval placentas in 5 cases(5%), irregular placentas in 3 cases (3%), and bilobed placenta in 1 case (1%), respectively. Normal cord insertion was found in 75% and abnormal insertion in 25% of cases respectively. The mean placental weight was 509.5g (normal weight ranges between 400 to 650gs).
 Conclusion:
 In the present study, the majority of the placentas presented with round shape,few placentae with oval and irregular shape or with an accessory lobe. The existing study alsoincluded variations in insertion of umbilical cords which was eccentric in majority of the casesfollowed by central and marginal insertion.
4
Morrish, D. W., H. Marusyk, and O. Siy. "Demonstration of specific secretory granules for human chorionic gonadotropin in placenta." Journal of Histochemistry & Cytochemistry 35, no. 1 (1987): 93–101. http://dx.doi.org/10.1177/35.1.2432115.
Texto completo da fonteResumo:
Existence of secretory granules and exocytosis during secretion of human chorionic gonadotropin (hCG) in human placenta has been a point of controversy. Using two methods, the highly sensitive avidin-biotin complex (ABC) method and the protein A-gold technique, for immunochemical identification of beta-hCG on electron microscopic sections, we have examined placentas at 8-10 weeks gestation and at term for the presence of secretory granules. First-trimester placentas demonstrated plentiful syncytiotrophoblast cytoplasmic granules, some undergoing exocytosis, when stained using specific beta-hCG antiserum in the ABC and protein A-gold methods. Term placentas did not show positive reaction product. The data demonstrate that the classic secretory granule-exocytosis pathway mediates placental hCG secretion. However, clear morphological differences exist between placenta granules and hormone secretory granules observed in pituitary, consistent with known functional differences between these organs. This methodology will be useful for further studies of the secretory pathways for placental peptides.
5
Lobo, Sonja E., Luciano César P. C. Leonel, Carla M. F. C. Miranda, et al. "The Placenta as an Organ and a Source of Stem Cells and Extracellular Matrix: A Review." Cells Tissues Organs 201, no. 4 (2016): 239–52. http://dx.doi.org/10.1159/000443636.
Texto completo da fonteResumo:
The placenta is a temporal, dynamic and diverse organ with important immunological features that facilitate embryonic and fetal development and survival, notwithstanding the fact that several aspects of its formation and function closely resemble tumor progression. Placentation in mammals is commonly used to characterize the evolution of species, including insights into human evolution. Although most placentas are discarded after birth, they are a high-yield source for the isolation of stem/progenitor cells and are rich in extracellular matrix (ECM), representing an important resource for regenerative medicine purposes. Interactions among cells, ECM and bioactive molecules regulate tissue and organ generation and comprise the foundation of tissue engineering. In the present article, differences among several mammalian species regarding the placental types and classifications, phenotypes and potency of placenta-derived stem/progenitor cells, placental ECM components and current placental ECM applications were reviewed to highlight their potential clinical and biomedical relevance.
6
GOSWAMI, PUSHPA, SAMREEN MEMON, MUHAMMAD ASLAM CHANNA, and Hemlata Rathi. "EXCESSIVE CALCIFICATION OF PLACENTA;." Professional Medical Journal 20, no. 05 (2013): 743–51. http://dx.doi.org/10.29309/tpmj/2013.20.05.1452.
Texto completo da fonteResumo:
Objective: To examine the morphological change due to excessive calcification of placenta of pregnancies complicated bypregnancy induced hypertension (PIH) and placental Abruption and its relation with fetal outcome. Study design: Case control type ofstudy. Place and duration: This study was conducted from June 2008 to July 2009 at the department of Anatomy of Liaquat University ofMedical & Health Sciences Jamshoro. Material and Methods: One hundred twenty placentae were collected from labor room andgynecology operation theatre of Liaquat University Hospital. Forty placentae from parturients that had pregnancy induced hypertension(PIH), forty from parturient having placental abruption & forty placentae of normal pregnancy (Control Group). Age of all parturients isbetween 17 to 32 years. Fetal outcome and data was recorded. Weight and diameter of Placentae were measured. Approximately five cmpiece of placenta was taken and processed for histological study. Results: The weight of placenta in control group were 450 to 650 gmwith a mean weight of 526.25± 8.414 gm and their diameter from 19 to 24 cm with a mean of 21.225±0.2148cm. In PIH group weight ofplacenta was from 200 to 550gm with a mean weight of 432.25 ± 11.889gm and their diameter ranges from 10 to 16cms with amean14.208 ± 0.1914cm. In placental abruption group the weight of placenta ranges from 180 to 400 gm with a mean weight of 284.88±9.084 gms and diameter ranges from 10 to 14cms with mean 13.070 ± 0.2504 cm. The difference in weight and diameter of placentain PIH and abruptio placentae was found statistically significant when compared with weight and diameter of normal placentae. Theweight of new born babies in control group was 1.8 kg to 3.6 kg mean weight of 2.790± 0.0689kg. In PIH group, the fetal weight was 1.4kg to 3.0 kg with a mean weight of 2.195 ±0.0703kg. In abruptio placentae group, the weight of new born baby ranges from 1.0 kg to2.8kg with a mean weight of 1.898 ± 0.0660 kg. Conclusions: Fetal outcome in cases of PIH and in abruptio placentae was poor ascompared to control group.
7
Hiremath, Jayashree N., and Ramesh P. "Cross-Sectional Study of Placental Surface Area and Umbilical Cord Attachment on Placenta in Normal and PIH Pregnancy and Its Effects on Foetal Weight." International Journal of Anatomy and Research 10, no. 1 (2022): 8297–300. http://dx.doi.org/10.16965/ijar.2021.212.
Texto completo da fonteResumo:
Introduction: Pregnancy-induced hypertension (PIH) is one of the risk factor in pregnancy leading to placental insufficiency which in turn is responsible for maternal and foetal morbidity and mortality. PIH causes morphological changes in placenta. Decreased placental surface area and variation in the attachment of umbilical cord on placenta are more commonly noted in PIH which hampers the uteroplacental perfusion resulting in foetal mortality and morbidity. Hence afforts were made to study the incidence of reduced placental surface area and mode of cord attachment on placenta. Materials and methods: The study was conducted in the Department of Anatomy, Sri Siddhartha medical college and Hospital, Tumakuru, Karnataka. A total of 100 (50 normal and 50 PIH) human placentae were studied. Placental surface area and mode of attachment of umbilical cord in normal and PIH pregnancy were measured and noted. This study was analysed statistically by using Unpaired t-test and Chi-square test. Results: The study revealed significantly decrease in placental surface area and also there is increased incidence of central and marginal attachment of umbilical cord in PIH cases. Conclusion: Study reveals, PIH cause morphological changes in placenta, it decreasing the uteroplacental blood flow which reduces foetal nutrition ultimately decreasing the neonatal weight. KEY WORDS: PIH, uteroplacental blood flow, neonatal weight, placental surface area and Umbilical cord.
8
Vishram Singh, Kumud Ranjan, Tewarson S L, Rashi Singh та Yogesh Yadav. "Study of placental morphometric anatomy in mothers with gestational diabetes mellitus and inৎluence of gestational diabetes mellitus on the fetal weight". International Journal of Research in Pharmaceutical Sciences 11, № 4 (2020): 7549–58. http://dx.doi.org/10.26452/ijrps.v11i4.3961.
Texto completo da fonteResumo:
The placenta is an organ which is an indicator of maternal and fetal disorders. Gestational Diabetes mellitus complicates 2-5% of all pregnancy. Therefore our work was an analysis of changes in placental morphometric anatomy in mothers of gestational diabetes mellitus and the influence of gestational diabetes mellitus on the fetal weight. Sixty-two placentas of full-term pregnancy collected from labour room/operation theatre of Gynaecology and obstetrics, department of government medical college and super facility hospital Azamgarh, Uttar Pradesh. Out of sixty-two placentas, 31 are from mothers with no known history of preexisting gestational diabetes mellitus cases as controls and 31 collected from mothers with gestational diabetes mellitus. We found mean placental weight, mean placental area, mean placental volume, mean no of cotyledons significantly more in placentas of gestational diabetic mothers. Mean fetal weight of gestational diabetic mothers were more in comparison with controls. Mean transverse diameter of placentas of the diabetic mothers were more than mean transverse diameter of placentas of the non-diabetic mothers, statistically significant. Mean longitudinal diameter also more in placentas of diabetic mothers, not statistically significant. Mean thickness at the centre more in placentas of diabetic mothers, statistically significant. Mean thickness mid-way between centre and margin and mean thickness at margin more in diabetic placentas, not statistically significant. Gestational diabetic mothers had more round-shaped placentas. Marginal insertion of umbilical cord presents more in placentas of gestational diabetic mothers.
9
Vishram Singh, Kumud Ranjan, Tewarson S L, Rashi Singh та Yogesh Yadav. "Study of placental morphometric anatomy in mothers with gestational diabetes mellitus and inৎluence of gestational diabetes mellitus on the fetal weight". International Journal of Research in Pharmaceutical Sciences 11, № 4 (2020): 7549–58. http://dx.doi.org/10.26452/ijrps.v11i4.3961.
Texto completo da fonteResumo:
The placenta is an organ which is an indicator of maternal and fetal disorders. Gestational Diabetes mellitus complicates 2-5% of all pregnancy. Therefore our work was an analysis of changes in placental morphometric anatomy in mothers of gestational diabetes mellitus and the influence of gestational diabetes mellitus on the fetal weight. Sixty-two placentas of full-term pregnancy collected from labour room/operation theatre of Gynaecology and obstetrics, department of government medical college and super facility hospital Azamgarh, Uttar Pradesh. Out of sixty-two placentas, 31 are from mothers with no known history of preexisting gestational diabetes mellitus cases as controls and 31 collected from mothers with gestational diabetes mellitus. We found mean placental weight, mean placental area, mean placental volume, mean no of cotyledons significantly more in placentas of gestational diabetic mothers. Mean fetal weight of gestational diabetic mothers were more in comparison with controls. Mean transverse diameter of placentas of the diabetic mothers were more than mean transverse diameter of placentas of the non-diabetic mothers, statistically significant. Mean longitudinal diameter also more in placentas of diabetic mothers, not statistically significant. Mean thickness at the centre more in placentas of diabetic mothers, statistically significant. Mean thickness mid-way between centre and margin and mean thickness at margin more in diabetic placentas, not statistically significant. Gestational diabetic mothers had more round-shaped placentas. Marginal insertion of umbilical cord presents more in placentas of gestational diabetic mothers.
10
Hata, Toshiyuki, and Sarah Cajusay-Velasco. "Three-dimensional Power Doppler Ultrasound Study of the Placenta." Donald School Journal of Ultrasound in Obstetrics and Gynecology 8, no. 4 (2014): 400–409. http://dx.doi.org/10.5005/jp-journals-10009-1380.
Texto completo da fonteResumo:
ABSTRACT Advanced ultrasound technology has been a valuable tool in the assessment of placental anatomy and physiology. Conventional two-dimensional (2D) sonography reveals placental morphological characteristics, 2D color Doppler can assess blood flow in the placenta, 2D power Doppler can evaluate placental vascular trees, and three-dimensional (3D) ultrasound gives more detailed information on the surface anatomy. Recent advances, such as 3D power Doppler with virtual organ computer aided-analysis (VOCAL) and histogram analysis can measure the placental volume, and assess uteroplacental and fetoplacental perfusions. In particular, ‘placental vascular sonobiopsy’ can specifically evaluate the second- and thirdtrimester placental blood flow and vascularity by obtaining several spherical samples from the placenta that will represent the entire placenta. This article presents normal placental development and pathological findings of the placenta using 3D power Doppler ultrasound, and discusses 3D power Doppler assessments of placental perfusion in high-risk pregnancies, such as fetal growth restriction, pregnancy-induced hypertension and preeclampsia, and, from this basis, re-establishes the importance of 3D power Doppler ultrasound as a screening, diagnostic, and surveillance tool in normal and abnormal pregnancies. How to cite this article Tanaka H, Cajusay-Velasco S, Noguchi J, Hata T. Three-dimensional Power Doppler Ultrasound Study of the Placenta. Donald School J Ultrasound Obstet Gynecol 2014;8(4):400-409.