Table 2.

Fertilization rate and semen parameters as evaluated in a pairwise comparison between the first and second ART attempt, performed respectively before and after COVID-19 vaccination.

Variables	Pre-vaccination	Post-vaccination	p-value
Volume (ml)	2.5 [1.5–3.0]	2.5 [1.8–3.0]	0.77
Concentration (M/ml)	41 [15–70]	35 [16–66]	0.82
Total N. spermatozoa (M)	94.5 [30.0–175.3]	81.3 [30.9–150.0]	0.99
Progressive motility (%)	43 [30–55]	40 [30–50]	0.14
Total motility (%)	53 [40–62]	50 [40–60]	0.21
Morphologically normal forms (%)	4 [2–6]	4 [3–6]	0.21
Total number of progressively motile spermatozoa (M)	39.0 [9.0–81.8]	32.9 [10.5–69.1]	0.77
Fertilization rate (%)	75 [50–100]	80 [50–100]	0.64