Table 1. Comparison between IVF and PA blastocyst at days 7 and 9 of development.

Group	COCs n	Blastocyst (Day 7) n (%)	Cultured in exosome-depleted media Blastocyst (Day 7) to Expanded blastocyst (Day 9)
			n	diameter, μm (x±sd)	n (%)	diameter, μm (x±sd)
PA	215	77 (35.8%)	63	183.3±43.2	33 (52.4%)	274.4±51.8a
IVF	216	63 (29.2%)	60	197.2±38.8	33 (55.0%)	338.3±95.3b
P value		0.15		0.17	0.85	0.02

Values in the same column carrying different superscripts are considered statistically significant at p < 0.05. COCs: cumulus oocyte complexes.