TABLE 5.
Treatment outcomes of embryo transfers using frozen‐thawed oocytes based on medical indications in ART clinics in Japan, 2018
| Variables | Embryo transfer using frozen‐thawed oocytes |
|---|---|
| No. of registered cycles | 236 |
| No. of ET | 136 |
| No. of cycles with pregnancy | 38 |
| Pregnancy rate per ET | 27.9% |
| SET cycles | 91 |
| Pregnancy following SET cycles | 22 |
| Rate of SET cycles | 66.9% |
| Pregnancy rate following SET cycles | 24.2% |
| Miscarriages | 11 |
| Miscarriage rate per pregnancy | 29.0% |
| Singleton pregnancies a | 30 |
| Multiple pregnancies a | 4 |
| Twin pregnancies a | 4 |
| Triplet pregnancies a | 0 |
| Quadruplet pregnancies a | 0 |
| Multiple pregnancy rate a | 11.8% |
| Live births | 21 |
| Live birth rate per ET | 15.4% |
| Total number of neonates | 23 |
| Singleton live births | 19 |
| Twin live births | 2 |
| Triplet live births | 0 |
| Quadruplet live births | 0 |
| Pregnancy outcomes | |
| Ectopic pregnancies | 0 |
| Heterotopic pregnancy | 0 |
| Artificial abortions | 0 |
| Still births | 0 |
| Fetal reduction | 0 |
| Unknown cycles for pregnancy outcomes | 2 |
Abbreviations: ET, embryo transfer; SET, single embryo transfer.
a
Singleton, twin, triplet and quadruplet pregnancies were defined according to the numbers of gestational sacs in utero.