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Table 3 Clinical outcome of injection of frozen-thawed donor sperm of normal quality vs. autologous fresh sperm of poor quality into frozen-thawed oocytes

From: Slow oocyte freezing and thawing in couples with no sperm or an insufficient number of sperm on the day of in vitrofertilization

  ICSI of frozen-thawed oocytes in couples with severe azoospermia or oligoasthenoteratozoospermia
  DONOR SPERM (normal quality) AUTOLOGOUS EJACULATED OR TESTICULAR SPERM (poor quality)
Patients 4 9
ICSI cycles 4 10
Mean female age (years) 31.2 (range 28 - 38) 31.1 (range 28 - 37)
Injected oocytes 18 93
Fertilized oocytes 13 (72.2%)* 38 (40.9%)*
Embryos 11 23
Blastocysts 4 4
Blastocyst rate 36.4% 17.4%
Embryo transfers (ET) 2 5
Pregnancies 1 1
Clinical pregnancy rate per ET 50.0% 20.0%
Clinical pregnancy rate per thawing cycle 25.0% 11.1%
Birth of a child 1 1
  1. *Statistically significant difference as evaluated by the Chi-Square test at P < 0.05.