Publications by authors named "Seisuke Sayama"

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Impact of parity and pre-pregnancy BMI on second-trimester sFlt-1 and PlGF levels in normotensive pregnancies.
Motoaki Kinugawa, Keiichi Kumasawa, Kazunari Nemoto, Keisuke Nakajima, Mari Ichinose, Seisuke Sayama

Hypertens Pregnancy· December 2025

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Elevated serum sFlt-1 at 18-20 weeks in advanced maternal age: a key difference from younger pregnancies.
Kazunari Nemoto, Keiichi Kumasawa, Motoaki Kinugawa, Keisuke Nakajima, Kei Inaba, Seisuke Sayama

Hypertens Pregnancy· December 2025

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Decreased placental growth factor levels precede the onset of gestational diabetes mellitus: Insights into placental dysfunction and endothelial pathophysiology.
Keisuke Nakajima, Keiichi Kumasawa, Motoaki Kinugawa, Kazunari Nemoto, Mari Ichinose, Seisuke Sayama

Placenta· November 2025

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Doppler abnormality predisposes preterm infants with fetal growth restriction to postnatal intestinal disorder.
Tomohiro Ohtani, Mari Ichinose, Yu Ariyoshi, Miho Irie, Masatake Toshimitsu, Seisuke Sayama

J Obstet Gynaecol Res· September 2025

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Ischemic placental disease as a risk factor for bronchopulmonary dysplasia in extremely preterm infants.
Yu Ariyoshi, Takayuki Iriyama, Seisuke Sayama, Eri Suzuki-Ariyoshi, Eriko Yano

J Obstet Gynaecol Res· May 2025

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Successful Pregnancy Outcome With Preconception Care in a Symptomatic Carrier of Duchenne Muscular Dystrophy: Case Report and Literature Review.
Motoaki Kinugawa, Mari Ichinose, Haruka Matsui, Zeng Xiang, Seisuke Sayama

Am J Med Genet A· March 2025

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Neurological outcomes and associated perinatal factors in infants born between 22 and 25 weeks with active care.
Yu Ariyoshi, Takayuki Iriyama, Takahiro Seyama, Seisuke Sayama, Eriko Yano

J Perinatol· February 2025

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Hysteroscopic Endometrial Defect Following Adenomyomectomy and Incidence of Placenta Accreta Spectrum and Uterine Rupture Complications for Subsequent Pregnancy.
Mari Ichinose, Takayuki Iriyama, Osamu Hiraike, Seisuke Sayama, Ayako Hashimoto

Reprod Sci· February 2025

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The Effects of Low Concentrations of Pravastatin on Placental Cells.
Masako Kanda, Keiichi Kumasawa, Kazunari Nemoto, Risa Miyatake, Kei Inaba, Seisuke Sayama

Reprod Sci· October 2024

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Prediction of spontaneous vaginal delivery in the prolonged second stage using the delta angle of progression.
Eriko Yano, Seisuke Sayama, Takayuki Iriyama, Yu Ariyoshi, Naoya Akiba

Am J Obstet Gynecol MFM· August 2024

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Increased risk of placenta previa and preterm birth in pregnant women with endometriosis/adenomyosis: A propensity-score matching analysis of a nationwide perinatal database in Japan.
Kosuke Kato, Takayuki Iriyama, Konan Hara, Kensuke Suzuki, Ayako Hashimoto, Seisuke Sayama

J Obstet Gynaecol Res· March 2024

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Clinical characteristics and outcomes of women with adenomyosis pain during pregnancy: a retrospective study.
Seisuke Sayama, Takayuki Iriyama, Yotaro Takeiri, Ayako Hashimoto, Masatake Toshimitsu

J Perinat Med· February 2024

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Changes in fetal presentation in the preterm period and the prediction of non-cephalic delivery.
Kosuke Kato, Takeshi Nagamatsu, Shogo Yamaguchi, Mari Ichinose, Seisuke Sayama

J Matern Fetal Neonatal Med· December 2023

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Efficacy of prompt administration of cryoprecipitate in severe postpartum hemorrhage of preeclampsia patients.
Keisuke Nakajima, Tatsuya Fujii, Takayuki Iriyama, Mari Ichinose, Masatake Toshimitsu, Seisuke Sayama

J Obstet Gynaecol Res· December 2023

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Differences in the incidence of obstetric complications depending on the extent and location of adenomyosis lesions.
Ayako Hashimoto, Takayuki Iriyama, Seisuke Sayama, Asuka Okamura, Kosuke Kato

J Matern Fetal Neonatal Med· December 2023

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Hypertensive disorders of pregnancy in moyamoya disease: A single institution experience.
Hirohisa Yajima, Satoru Miyawaki, Seisuke Sayama, Keiichi Kumasawa, Masako Ikemura

J Stroke Cerebrovasc Dis· November 2023

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Possible risks and benefits of adenomyomectomy on pregnancy outcomes: a retrospective analysis.
Seisuke Sayama, Takayuki Iriyama, Ayako Hashimoto, Kensuke Suzuki, Yu Ariyoshi

AJOG Glob Rep· November 2023

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A Case of Ruptured Exophytic Uterine Artery Pseudoaneurysm without Specific Risk Factors That Manifested Seven Days after Vaginal Delivery.
Masatake Toshimitsu, Takayuki Iriyama, Jiro Sato, Osamu Abe, Mari Ichinose, Seisuke Sayama

Case Rep Obstet Gynecol· November 2023

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The sFlt-1/PlGF Ratio Trend Is Useful in Predicting Preeclampsia Severity in Hyperreactio Luteinalis Complicated with Preeclampsia.
Risa Miyatake, Tatsuya Fujii, Keiichi Kumasawa, Mari Ichinose, Masatake Toshimitsu, Seisuke Sayama

Case Rep Obstet Gynecol· September 2023

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COVID-19 mRNA vaccination status and concerns among pregnant women in Japan: a multicenter questionnaire survey.
Ken Takahashi, Osamu Samura, Akihiro Hasegawa, Haruna Okubo, Keiji Morimoto, Seisuke Sayama

BMC Pregnancy Childbirth· May 2023

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A successful management of refractory immune thrombocytopenic purpura with Eltrombopag during pregnancy complicated with superimposed preeclampsia.
Dai Miyashita, Seisuke Sayama, Takayuki Iriyama, Kumi Nakazaki, Masatake Toshimitsu

Oxf Med Case Reports· May 2023

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The head direction to the angle of progression ratio: a quantitative parameter for intrapartum evaluation of cephalic malposition.
Eriko Yano, Takayuki Iriyama, Seisuke Sayama, Yu Ariyosi, Naoya Akiba

Am J Obstet Gynecol MFM· January 2023

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Increased production of inflammatory cytokines and activation of microglia in the fetal brain of preeclamptic mice induced by angiotensin II.
Yoshihisa Katoh, Takayuki Iriyama, Eriko Yano, Seisuke Sayama, Takahiro Seyama

J Reprod Immunol· December 2022

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Postpartum degeneration of adenomyosis with diffuse cyst-like changes and localized hemorrhage detected by sequential magnetic resonance imaging.
Mari Ichinose, Takayuki Iriyama, Seisuke Sayama, Masatake Toshimitsu, Takahiro Seyama

J Obstet Gynaecol Res· November 2022

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A Case of Preeclampsia with Uterine Necrosis after Uterine Artery Embolization for Postpartum Hemorrhage.
Midori Yoshikawa, Takahiro Seyama, Takayuki Iriyama, Seisuke Sayama, Tatsuya Fujii

Case Rep Obstet Gynecol· May 2022

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