Background And Aim: Both nuclear and cytoplasmic maturation of oocytes have to be completed in a coordinated manner to ensure optimal conditions for fertilization. This is well known for in vitro fertilization, but is debated for intracytoplasmic sperm injection (ICSI). It has been reported that preincubation of oocytes prior to ICSI is associated with improved maturation of oocytes, fertilization and embryo quality. Therefore, in the present study, we evaluated the fertilization rate, embryo quality and pregnancy rate in relation to incubation times of metaphase-II oocytes before ICSI.
Method: We analyzed 135 selected ICSI cycles. Subjects were assigned to six groups according to oocyte incubation time before ICSI: 2-4 h, 5 h, 6 h, 7 h, 8 h and 9-12 h.
Results: We observed that the fertilization rate increased slightly at short (2 to 6 h) and then decreased at longer preincubation times (7 to 12 h). Concomitantly, cleavage rate increased up to 6 h of preincubation and decreased significantly in the groups in which ICSI was carried out after 7 to 12 h of incubation. With regard to clinical pregnancy rate, we observed a significant increase from 2 to 5 h of preincubation, when this parameter reached its maximum value (35%), tapering to 33% after 6 h and then dropping sharply to 12 h.
Conclusions: These data confirm that the most appropriate incubation time for mature oocytes before ICSI is 5-6 h. This time improves embryo quality and pregnancy rate in ICSI cycles.
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http://dx.doi.org/10.1080/09513590802095613 | DOI Listing |
J Assist Reprod Genet
January 2025
Meir Medical Center, Kfar Saba, Israel.
Purpose: Studies have shown mixed findings regarding the impact of stress on the success of fertility treatments. To the best of our knowledge, stress in the context of the workplace has not been investigated to date in relation to the success of fertility treatments. This research investigates the impact of work-related stress and emotional exhaustion experienced by both partners on in vitro fertilization (IVF) treatment outcomes.
View Article and Find Full Text PDFLupus
January 2025
College of Pharmacy, Chung-Ang University, Seoul, South Korea.
Objectives: To investigate the trends in immunomodulator use and pregnancy outcomes among pregnant women with systemic lupus erythematosus (SLE), a condition requiring medication to maintain disease activity.
Methods: This descriptive study used data from the National Health Information Database in Korea from 2002 to 2018. We included 5,044 pregnancies initiated between 2005 and 2017 in 3,120 SLE patients.
Contracept Reprod Med
January 2025
Department of Health Sciences, Global Health Unit, University Medical Center Groningen, Groningen, The Netherlands.
Background: The World Health Organization (WHO) recommends an interval of at least 24 months from the date of a live birth to the conception of the next pregnancy in order to reduce the risk of adverse maternal, perinatal, and infant outcomes. There is limited data about the implementation of this recommendation and its contributing factors in low-land ecologies in Oromia, which is the biggest regional state in Ethiopia.
Objective: To assess the inter-pregnancy interval and determine associated factors among parous women in selected low-land districts of Arsi and East Shoa Zone.
BMC Pregnancy Childbirth
January 2025
Department of Women's and Children's Health, Uppsala University, Uppsala, 751 85, Sweden.
Background: Stillbirth occurs at a rate of 3.0 per thousand in Sweden. However, few studies have focused on the initial experiences of parents facing a stillbirth.
View Article and Find Full Text PDFJ Assist Reprod Genet
January 2025
NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, School of Basic Medical Sciences, Central South University, Changsha, China.
Purpose: This study identified novel variants of the FSIP2 and SPEF2 genes in multiple morphological abnormalities of the sperm flagella (MMAF) patients and to investigate the potential effect of variations on male infertility and assisted reproductive outcomes.
Methods: Whole-exome sequencing was performed in 106 Chinese MMAF patients. The discovered variants were evaluated in silico and confirmed by Sanger sequencing.
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