Table 2. Ovarian stimulation characteristics and ART outcomes after the first ET for the OMA group and the control group.
| OMA group n = 201 | Control group n = 402 | p-value | |
|---|---|---|---|
| Number of oocytes retrieved | 7.5 ± 5.4 | 9.4 ± 6.1 | < 0.001a |
| Number of MII oocytes | 6.4 ± 4.8 | 7.6 ± 5.0 | 0.009a |
| Number of 2PN embryos | 4.4 ± 3.4 | 4.9 ± 3.7 | 0.136a |
| Maturation ratec | 0.9 ± 0.2 | 0.8 ± 0.2 | 0.029a |
| Fertilization rated | 0.7 ± 0.3 | 0.7 ± 0.3 | 0.138a |
| Mean No. of blastocyst embryos obtained | 1.7 ± 3.1 | 2.1 ± 3.0 | 0.178a |
| Mean No. of embryos transferred * | 1.5 ± 0.5 | 1.4 ± 0.5 | 0.143a |
| Implantation ratee* | 0.3 ± 0.42 | 0.4 ± 0.48 | 0.102a |
| Clinical pregnancy rate * | 53/151 (35.0) | 134/324 (41.3) | 0.226b |
| Live birth rate * | 39/151 (25.8) | 99/324 (30.5) | 0.329b |
| Early pregnancy loss ratef* | 14/53 (26.4) | 32/134 (23.8) | 0.851b |
ART: assisted reproduction technology; ET: embryo transfer; OMA: endometrioma
Data are the mean ± standard deviation or n (%), unless specified otherwise.
a Student’s t-test.
b Pearson’s χ2 test.
c maturation rate = the number of MII oocytes / the number of oocytes retrieved
d fertilization rate = the number of 2PN / the number of mature oocytes
e implantation rate = the number of gestational sacs /the number of embryos transferred
f early pregnancy loss rate = the number of miscarriages / the number of clinical pregnancies
* After the first embryo transfer