1. Time-Lapse
-Cleavage-stage development is a dynamic process in which embryo
morphology may change significantly over a time span (h).
-Conventional grading practices may not detect subtle differences between
individual embryos, such as the time to progress from one cleavage division
to the next.
-The use of an automated instrument with programmable time-lapse image
acquisition, allows data to be collected for individual embryos during
development to quantify the exact timing of each cell division.
5. Implantation Success; ESDMorphology
included
ok
Grade A Grade B Grade C Grade D Grade E Discarded
non viable
excluded
yes no
yes nono yes
A+ A E+ EB+ B C+ C D+ D
CC2 5- 12h CC2 5-12h CC2 5-12h CC2 5-12h CC2 5-12h
yes no yes no yes no yes no yes no
Exclusion
Criteria
Direct Cleavage
Uneven Blastomere
T5
48-56h
T3
35-40h
T3
35-40h
embryo kinetics and implantation
8. Cumulus cells — Transcriptomics at an early stage
- To identify reliable genomic biomarkers
expressed in cumulus cells that accurately
and non-invasively can predict the oocyte
developmental competence and reinforce
the already used morphological criteria.
- Gene expression assessed using microarray
platforms
- The oocyte triggering stimulates the
expression of genes involved in the
granulosa luteinization process and
ovulation finality − a crucial step during
follicular development to produce a fully
healthy oocyte
- Several genes are also differentially
associated to successful pregnancy and
implantation
9. Investigating spent culture medium
Pyruvate
Glucose
Amino acids
Sugars
Uptake
Hormones
Lactate
Ammonia
Enzymes
Production
Other factors
- A noninvasive metabolomic profile of the culture medium surrounding the
embryo with an analysis of the components produced or depleted by
them can be achieved by different technologies.
- Multivariable analysis could be applied and models based on viability
index may be used in the embryo selection process.
10. Proteomics
• Multiple protein analysis of
human embryo secretions
offers the chance to expand our
perspective of a noninvasive
quantification of human
embryonic viability and even
chromosomal normality
avoiding any type of
manipulation.