Keiichi Kato
ORCID: 0000-0002-1394-4532
· 15 papers in corpus
observational
2025
PURPOSE: The time at which embryo developmental velocity variations occur remains unknown. Therefore, we analysed the morphokinetic trajectory of human early fertilisation from the extrusion of the second polar body (PB2) to pronuclear brea…
observational
2024
BACKGROUND: Vitrification procedures decrease intracytoplasmic lipid content and impair developmental competence. Adding fatty acids (FAs) to the warming solution has been shown to recover the lipid content of the cytoplasm and improve deve…
observational
2023
PURPOSE: We evaluated whether preimplantation genetic testing for aneuploidy (PGT-A) could increase the cumulative live birth rate (CLBR) in patients with recurrent implantation failure (RIF) and recurrent pregnancy loss (RPL). METHODS: Th…
other
2023
PURPOSE: This study aimed to examine the embryonic development of human 4-cell stage embryos after warming with fatty acids (FAs) and to assess the pregnancy outcomes after single vitrified-warmed cleavage stage embryo transfers (SVCTs). M…
observational
2023
OBJECTIVE(S): To assess the prevalence of chronic endometritis (CE) in patients with infertility and hydrosalpinx or peritubal adhesions and to examine the effects of laparoscopic surgical correction (LSC) on CE and pregnancy rates post in …
observational
2022
PROPOSE: Does an annotation-free embryo scoring system based on deep learning and time-lapse sequence images correlate with live birth (LB) and neonatal outcomes? METHODS: Patients who underwent SVBT cycles (3010 cycles, mean age: 39.3 ± 4…
observational
2022
BACKGROUND: Two types of endometrial preparation protocols are used for frozen embryo transfers in current practice: hormone replacement and the natural cycle. Endometrial preparation in the natural cycle reportedly increases the chances of…
2022
observational
2021
BACKGROUND: The KIDScore™ Day 5 (KS-D5) model, version 3, is a general morphokinetic prediction model (Vitrolife, Sweden) for fetal heartbeat prediction after embryo transfer that was developed based on a large data set that included implan…
observational
2018
STUDY QUESTION: Are there any differences in live birth rates (LBR) following fresh blastocyst transfer in natural or clomiphene-stimulated cycles, or after elective blastocyst freezing in clomiphene-stimulated cycles followed by thawing an…
observational
2018
PURPOSE: The purpose of this study was to examine whether preconception maternal dietary pattern is associated with in vitro fertilization (IVF) outcome among Japanese women. METHODS: This prospective study included 140 Japanese women who …
observational
2014
PURPOSE: We retrospectively examined a large cohort of females who underwent single blastocyst transfer to determine if initial β-human chorionic gonadotrophin (β-hCG) levels on day 7 after single vitrified-warmed blastocyst transfer (SVBT)…
other
2010
The treatment for severe adenomyosis has usually been hysterectomy, because there is no line of demarcation between diseased and normal tissue. Yet many such women wish to retain their uterus and some even wish to bear children. This report…
2008
other
1997
OBJECTIVE: In our previous study, 119 patients with histologically confirmed endometriosis underwent a 'three-step' therapy between 1987 and 1989, where surgical removal of endometriosis was followed by a 6 month treatment with 3 x 300 micr…