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

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

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

^*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
^**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

ISSN: 1755-8166