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Objective <p>To report pregnancy and perinatal outcomes following intracytoplasmic sperm injection using a piezo element (PIEZO-ICSI) in a large Japanese cohort undergoing vitrified-warmed single blastocyst transfer. Outcomes from conventional IVF cycles were included as a reference population sharing similar ovarian stimulation and embryo transfer protocols.</p> Methods <p>This study was a&#xa0;retrospective cohort study conducted in two fertility centers in Japan. A total of 1,822 PIEZO-ICSI cycles from 1,072 patients aged &lt; 40 years at oocyte retrieval&#xa0;were included between June 2016 and August 2023. A reference population of 1,701 IVF cycles from 996 patients was included for context.</p> Results <p>In the PIEZO-ICSI cohort, the clinical pregnancy rate was 49.9% (910/1,822) and the live birth rate was 38.7% (706/1,822). Among live births, the mean birth weight was 3,011.4 ± 467.9 g, mean gestational age was 38.59 ± 1.95 weeks, and congenital anomaly rate was 1.6% (11/706). These outcomes were comparable to the IVF reference population (clinical pregnancy rate 48.4%, live birth rate 37.9%, birth weight 3,022.8 ± 469.5 g, congenital anomaly rate 2.5%). The proportion of female infants was significantly higher in the PIEZO-ICSI group (53.2% vs. 43.4%; <i>P</i> &lt; 0.001).</p> Conclusion <p>PIEZO-ICSI is associated with favorable pregnancy and perinatal outcomes in women aged &lt; 40 years.</p>

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Pregnancy and perinatal outcomes following PIEZO-ICSI with vitrified-warmed single blastocyst transfer: a retrospective cohort study

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月23日

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  • Kenichiro Hiraoka,
  • Miki Osugi,
  • Moe Sato,
  • Yuko Kamada,
  • Hayata Nakajo,
  • Toshio Sujino,
  • Akira Komiya,
  • Yurie Nako,
  • Yuko Takayanagi,
  • Makiko Tajima,
  • Tatsuyuki Ogawa,
  • Kumi Ohuchi,
  • Masaru Hayashi,
  • Kiyotaka Kawai

摘要

Objective

To report pregnancy and perinatal outcomes following intracytoplasmic sperm injection using a piezo element (PIEZO-ICSI) in a large Japanese cohort undergoing vitrified-warmed single blastocyst transfer. Outcomes from conventional IVF cycles were included as a reference population sharing similar ovarian stimulation and embryo transfer protocols.

Methods

This study was a retrospective cohort study conducted in two fertility centers in Japan. A total of 1,822 PIEZO-ICSI cycles from 1,072 patients aged < 40 years at oocyte retrieval were included between June 2016 and August 2023. A reference population of 1,701 IVF cycles from 996 patients was included for context.

Results

In the PIEZO-ICSI cohort, the clinical pregnancy rate was 49.9% (910/1,822) and the live birth rate was 38.7% (706/1,822). Among live births, the mean birth weight was 3,011.4 ± 467.9 g, mean gestational age was 38.59 ± 1.95 weeks, and congenital anomaly rate was 1.6% (11/706). These outcomes were comparable to the IVF reference population (clinical pregnancy rate 48.4%, live birth rate 37.9%, birth weight 3,022.8 ± 469.5 g, congenital anomaly rate 2.5%). The proportion of female infants was significantly higher in the PIEZO-ICSI group (53.2% vs. 43.4%; P < 0.001).

Conclusion

PIEZO-ICSI is associated with favorable pregnancy and perinatal outcomes in women aged < 40 years.