Research Question: Are there significant differences between cumulative live birth rates (CLBR) after short or extended embryo culture when comparisons are performed per cycle?
Design: This French national study included all IVF cycles performed from January 2016 to December 2019 with at least one cleaved embryo at day 2. The day 2/3 and day 5/6 groups were identified using the National Biomedicine Agency register. Only attempts involving the vitrification method were included.
Importance: Cancer is a leading cause of death among children worldwide. Treatments used for medically assisted reproduction (MAR) are suspected risk factors because of their potential for epigenetic disturbance and associated congenital malformations.
Objective: To assess the risk of cancer, overall and by cancer type, among children born after MAR compared with children conceived naturally.
The oocyte transcriptome follows a tightly controlled dynamic that leads the oocyte to grow and mature. This succession of distinct transcriptional states determines embryonic development prior to embryonic genome activation. However, these oocyte maternal mRNA regulatory events have yet to be decoded in humans.
View Article and Find Full Text PDF