The density of the inner cell mass is a new indicator of the quality of a human blastocyst: a valid supplement to the Gardner scoring system.

What Was Tested

The paper reports a study of Copper (Supplement), published as an observational study.

The main disadvantage of this current method is that the evaluation of blastocyst ICM is relatively rough and cannot meet the needs of clinical embryologists, especially when multiple blastocysts have the same ICM score, which makes them difficult to evaluate further.

Why It Was Studied

Can the density of the inner cell mass (ICM) be a new indicator of the quality of the human blastocyst?

The densification index (DI) developed in this study can quantify ICM density and provide positive guidance for ploidy, pregnancy, and live birth.

Who Took Part

The age groups tagged for this paper are adults, women only.

How the Study Was Run

This observational study included data from 2272 blastocysts in 1991 frozen-thawed embryo transfer (FET) cycles between January 2018 to November 2021 and 1105 blastocysts in 430 preimplantation genetic testing cycles between January 2019 and February 2023.

FET, ICSI, blastocyst culture, trophectoderm biopsy, time-lapse (TL) monitoring, and next-generation sequencing were performed.

After preliminary sample size selection, the 11 focal plane images captured by the TL system were normalized and the spatial frequency was used to construct the DI of the ICM.

What Was Measured

In evaluating the quality of ICM, reproductive care clinics still use size indicators without further evaluation.

The association between the density of ICM and chromosomal mosaicism was not evaluated.

The subject headings attached to it are Blastocyst Inner Cell Mass, Embryo Transfer, Pregnancy Rate, Live Birth, Blastocyst, Embryo Culture Techniques and Preimplantation Diagnosis.

The authors tagged it with the keywords density, single-blastocyst transfers and time-lapse.

What This Means in Plain Language

This is an observational study of Copper (Supplement).

Its findings take up roughly 9 sentences of the abstract and are left out here on purpose; the source paper is the place to read them.

The publication is from 2024 (Human reproduction (Oxford, England)), a journal based in England.

More context: the Copper (Supplement) compound page, all human trials.