TABLE 1.
Oocyte and embryo characteristics of the IVF/ICSI attempts of the three probands.
| Individual | Age (years) | Duration of infertility (years) | IVF/ICSI attempts | Total number of oocytes | GV oocytes | MI oocytes | PB1 oocytes | Fertilized oocytes | Embryos arrested at an early stage | Usable embryos |
| II-1 in family 1 | 33 | 3 | IVF × 2 | 7 | 0 | 7 | 0 | 0 | 0 | 0 |
| II-1 in family 2 | 37 | 11 | IVF × 1 | 2 | 0 | 2 | 0 | 0 | 0 | 0 |
| ICSI × 2 | 14 | 2 | 7 | 5 | 1 | 1 | 0 | |||
| II-1 in family 3 | 32 | 2 | IVF × 1 | 8 | 1 | 2 | 5 | 2 | 2 | 0 |
| ICSI × 1 | 13 | 0 | 12 | 1 | 0 | 0 | 0 |
IVF, in vitro fertilization; ICSI, intracytoplasmic sperm injection; GV, germinal vesicle; MI, metaphase I; PB1, the first polar body.