CD9 Expression by Human Granulosa Cells and Platelets as a Predictor of Fertilization Success during IVF

Table 1

Correlations between CD9 expression on human granulosa cells (GCs) and platelets and fertilization rates in oocytes.

	Correlation with fertilization rate in all oocytes		Correlation with fertilization rate in mature oocytes^a
Measure of CD9 expression	Correlation coefficient	P-Value	Correlation coefficient	P-Value
Percent of GCs expressing CD9 (𝑛=30)	0.151	.43	0.135	.48
Surface density of CD9^b on GCs (𝑛=30)	−0.316	.09	−0.372	.04
Surface density of CD9^b on platelets (𝑛=26)	−0.141	.49	−0.029	.89

^aSee the text for the definition of mature oocytes.
^bCD9 surface density was measured as the mean intensity of CD9-PE fluorescence during flow cytometry.