Article
Obstetrics & Gynecology
Caroline J. Violette, Rachel S. Mandelbaum, Shinya Matsuzaki, Joseph G. Ouzounian, Richard J. Paulson, Koji Matsuo
Summary: This study found that assisted reproductive technology (ART) is associated with abnormal placentation. Pregnancy after ART is more likely to be diagnosed with abnormal placentation pathologies such as placenta accreta spectrum (PAS), placenta previa (PP), and vasa previa (VP). Additionally, pregnancy after ART is also associated with the coexistence of multiple types of abnormal placentation.
INTERNATIONAL JOURNAL OF GYNECOLOGY & OBSTETRICS
(2023)
Article
Medicine, General & Internal
Keita Hasegawa, Satoru Ikenoue, Yuya Tanaka, Maki Oishi, Toyohide Endo, Yu Sato, Ryota Ishii, Yoshifumi Kasuga, Daigo Ochiai, Mamoru Tanaka
Summary: This study aimed to investigate the accuracy of the placenta accreta index (PAI) for predicting placenta accreta spectrum (PAS) in women with placenta previa. The results showed that a PAI > 2 was the most effective cut-off point for predicting PAS and was more sensitive than traditional evaluation methods. Women with PAS had higher incidences of previous cesarean delivery, severe placental lacunae, thin myometrial thickness, anterior placenta, and presence of bridging vessels compared to those without PAS. PAI could be used to predict outcomes in women with placenta previa and reduce perinatal complications caused by PAS.
JOURNAL OF CLINICAL MEDICINE
(2023)
Review
Medicine, General & Internal
Yi-Chien Huang, Cheng-Chun Yang
Summary: Although planned cesarean delivery (PCD) is the main method for managing abnormal placentation, some patients still require emergency cesarean delivery (ECD). This study analyzed the impact of different delivery modes on neonatal outcomes. The results showed that PCD is associated with significantly better neonatal outcomes compared to ECD in terms of gestational age, birth weight, Apgar scores, neonatal intensive care unit admission, low Apgar scores, and neonatal mortality.
Editorial Material
Obstetrics & Gynecology
Kresimir Zivkovic, Anis Cerovac, Dubravko Habek
Summary: The article reminds people to consider a diagnosis of annular placenta and/or vasa previa even in the absence of antepartum hemorrhage.
INTERNATIONAL JOURNAL OF GYNECOLOGY & OBSTETRICS
(2022)
Article
Obstetrics & Gynecology
Amarnath Bhide
Summary: Screening for clinically significant placenta accreta spectrum (PAS) can accurately identify the condition with high sensitivity and specificity (>90-95%). The focus should be on women with placenta previa and previous Cesarean deliveries, as screening for PAS without placenta previa is less productive and may result in false negatives. Screening results can indicate a low or high probability of PAS, and women who test positive or have uncertain ultrasound features should be referred to specialized centers. Those confirmed with a high probability of PAS should plan for delivery at such centers.
BEST PRACTICE & RESEARCH CLINICAL OBSTETRICS & GYNAECOLOGY
(2023)
Review
Biochemistry & Molecular Biology
Shinya Matsuzaki, Yutaka Ueda, Satoko Matsuzaki, Mamoru Kakuda, Misooja Lee, Yuki Takemoto, Harue Hayashida, Michihide Maeda, Reisa Kakubari, Tsuyoshi Hisa, Seiji Mabuchi, Shoji Kamiura
Summary: This study examines the characteristics and obstetric outcomes of type II vasa previa and finds that they are similar to those of type I vasa previa. However, the current evidence is insufficient for a robust conclusion.
Article
Obstetrics & Gynecology
Ann Marie Mercier, Abigail M. Ramseyer, Bethany Morrison, Megan Pagan, Everett F. Magann, Amy Phillips
Summary: This case report highlights the importance of diagnosing and managing placenta increta as a potential cause of delayed postpartum hemorrhage, emphasizing the need for careful inspection and documentation of placenta implantation site during cesarean sections.
INTERNATIONAL JOURNAL OF WOMENS HEALTH
(2022)
Article
Obstetrics & Gynecology
Florrie N. Y. Yu, K. Y. Leung
Summary: Antenatal diagnosis of placenta accreta spectrum (PAS) disorders allows for planned management, reducing hemorrhagic morbidity. Cesarean section and placenta previa are common risk factors, and ultrasound is a promising diagnostic tool for PAS, even in the first trimester.
BEST PRACTICE & RESEARCH CLINICAL OBSTETRICS & GYNAECOLOGY
(2021)
Article
Medicine, General & Internal
Na Wang, Dandan Shi, Na Li, Hongyuan Qi
Summary: VEGF and sFlt-1 can be used as auxiliary indicators to diagnose PPP and distinguish between placenta accreta and increta.
ANNALS OF MEDICINE
(2021)
Article
Obstetrics & Gynecology
Ayamo Oben, Elizabeth B. Ausbeck, Melissa N. Gazi, Akila Subramaniam, Lorie M. Harper, Jeff M. Szychowski, Alan T. Tita
Summary: The study aimed to evaluate the association between the number of prior cesarean deliveries and early preterm delivery in women with placenta accreta spectrum (PAS) and placenta previa. The results showed that having two or more prior cesarean deliveries did not significantly increase the risk of preterm delivery in women with PAS. Therefore, scheduled delivery before 34 weeks is not recommended for this population to avoid associated morbidity with early preterm birth.
AMERICAN JOURNAL OF PERINATOLOGY
(2021)
Article
Obstetrics & Gynecology
Hatem Abu Hashim, Eman M. Shalaby, Mohammed H. Hussien, Mohamed El Rakhawy
Summary: The PAI score has been validated as a predictor for placenta accreta spectrum and shows promise as a predictive factor for high-risk women requiring hysterectomy.
INTERNATIONAL JOURNAL OF GYNECOLOGY & OBSTETRICS
(2022)
Article
Reproductive Biology
Elisa T. Zhang, Roberta L. Hannibal, Keyla M. Badillo Rivera, Janet H. T. Song, Kelly McGowan, Xiaowei Zhu, Gudrun Meinhardt, Martin Knoefler, Juergen Pollheimer, Alexander E. Urban, Ann K. Folkins, Deirdre J. Lyell, Julie C. Baker
Summary: The study identified misregulated gene expression patterns in tissues from placenta previa and percreta compared with control cases, with upregulated genes predominantly marking extravillous trophoblasts. PRG2 and AQPEP protein levels were found to be upregulated in both conditions, with AQPEP restricted to trophoblasts and PRG2 mislocalized throughout the fetal membranes. This suggests a signature of previa and PAS in the extraembryonic tissues surrounding the conceptus, reflecting increased trophoblast invasiveness.
BIOLOGY OF REPRODUCTION
(2021)
Article
Obstetrics & Gynecology
Clarel Antoine, Ricardo N. Pimentel, E. Albert Reece, Cheongeun Oh
Summary: The study aimed to assess a specific uterine closure technique at cesarean delivery and evaluate the relationship between previous cesarean delivery and subsequent abnormal implantation of the placenta, as well as neonatal and other perioperative outcomes. The results showed that the endometrium-free uterine closure technique was associated with fewer placental abnormalities in subsequent pregnancies and reduced maternal morbidity for future cesarean deliveries.
JOURNAL OF MATERNAL-FETAL & NEONATAL MEDICINE
(2021)
Article
Medicine, General & Internal
Shilei Bi, Lizi Zhang, Yulian Li, Yingyu Liang, Lijun Huang, Minshan Huang, Baoying Huang, Jinping Jia, Yinli Cao, Shaoshuai Wang, Xiaoyan Xu, Ling Fang, Yangyu Zhao, Xianlan Zhao, Qiying Zhu, Hongbo Qi, Suiwen Wen, Lanzhen Zhang, Hongtian Li, Jingsi Chen, Zhijian Wang, Lili Du, Dunjin Chen
Summary: This study found that compared to intrapartum cesarean delivery, prior prelabor cesarean delivery only increased the risk of postpartum hemorrhage in a subsequent pregnancy when complicated by placenta previa and placenta accreta spectrum disorders.
FRONTIERS IN MEDICINE
(2021)
Review
Biochemistry & Molecular Biology
Yuki Takemoto, Shinya Matsuzaki, Satoko Matsuzaki, Mamoru Kakuda, Misooja Lee, Harue Hayashida, Michihide Maeda, Shoji Kamiura
Summary: This study aimed to review the current evidence on type III vasa previa. A systematic review showed that type III vasa previa accounts for 5.7% of vasa previa cases. The characteristics and obstetric outcomes of type III vasa previa were similar to type I vasa previa. Further studies are warranted to obtain more evidence on type III vasa previa.