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Table 1 Baseline characteristics, AE result, and fertilization rate for the couples included in the analysis

From: Human sperm acrosome function assays are predictive of fertilization rate in vitro: a retrospective cohort study and meta-analysis

Variables Median (interquartile range) N
Female age (years) 29 (5) 737
Male age (years) 34 (7) 737
MII oocytes (n) 9 (8) 737
Abstinence days (n) 4 (2) 737
Semen volume (mL) 3.20 (1.5) 737
Concentration (× 106/mL) 42.00 (36) 737
Motility (%) 50.00 (12.6) 737
Forward progression motility (%) 35.10 (9.1) 737
Percentage of normal morphology (%) 4.46 (0.94) 737
Infertility duration (years) 4 (2) 737
Infertile diagnoses, n (%)
 Male factor 133 (18.05%) 737
 Female factor 353 (47.90%)
 Couple factors 251 (34.05%)
Infertile types, n (%)
 Primary infertility 476 (64.59%) 737
 Secondary infertility 261 (35.41%)  
Ovulation inducing protocols, n (%)
 Conventional long pituitary downregulation protocol 35 (4.75%) 737
 Modified ultra-long pituitary downregulation protocol 702 (95.25%)  
AE levels (μIU/106 spermatozoa) 13.78 (12.12) 737
FRa (%) 74.30 (5944/8000) 737
  1. AE acrosomal enzyme, MII metaphase II, IVF in vitro fertilization, FR fertilization rate
  2. aTotal fertilized oocytes/total MII oocytes