Table IV. Incidences of chromosomal abnormalities in different studies with a variable timing of karyotype analysis in the course of the infertility treatment.
| couples candidate for IVF/ICSI treatment | minimal 3 failed IVF/ICSI cycles | minimal 3 embryo transfers not leading to pregnancy | minimal 6 failed IVF cycles | |
| Clementini et al., 2005 | 1.92% (40/2078 women) | |||
| 2.02% (42/2078 men) | ||||
| 1.97% (82/4156 persons) | ||||
| Papanikolaou et al., 2005 | 0.58% (7/1206 normo-ovulatory women) | |||
| Present study | 1.68% (5/298 men) | 2.52% (8/317 women) | ||
| 2.11% (13/615 persons) | ||||
| Stern et al., 1999 | 2.53% (13/514 persons) | |||
| Raziel et al., 2002 | 10.77% (7/56 women) |