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Table 6 Monosomy rates of day 3 embryos compared to monosomy rates of day 5 embryos

From: New insights regarding origin of monosomy occurrence in early developing embryos as demonstrated in preimplantation genetic testing

Tested chromosome Chromosome size in bp Day 3 rate of monosomy * Day 5 embryo rate of monosomy** Day 5 monosomy rate/Day 3 monosomy rate
1 249,250,621 26/316 (8.2%) 3/405 (0.7%) 0.09
2 243,199,373 9/118 (7.6%) 6/405 (1.5%) 0.19
6 171,115,067 4/202 (2.0%) 5/405 (1.2%) 0.62
7 159,138,663 44/723 (6.0%) 6/405 (1.5%) 0.24
16 90,354,753 15/151 (9.9%) 22/405 (5.4%) 0.55
17 81,195,210 6/132 (4.5%) 0
19 59,128,983 14/331 (4.2%) 2/405 (0.49%) 0.12
20 63,025,520 5/26 (19.2%) 7/405 (1.7%) 0.09
X 155,270,560 9/84 (10.7%) 4/405 (1.0%) 0.09
  1. *Rate of monosomy calculated by number of embryos with monosomy of the tested chromosome divided by total number of embryos tested by the specific chromosome
  2. **Rate of monosomy calculated by number of embryos with monosomy (single and multiple) of the specific chromosome divided by number of tested embryos with results (405), as all embryos were tested for all chromosomes by CCS