Does Unilateral Oocyte Retrieval due to Transvaginally Inaccessible Ovaries, Contrary to Common Beliefs, Affect IVF/ICSI Treatment Outcomes That Much?
Table 2
IVF/ICSI cycle characteristics between unilateral and bilateral oocyte retrieval.
Unilateral aspiration ()
Bilateral aspiration ()
Duration of stimulation (days)
9.7 ± 2.1
9.6 ± 2.0
0.447
Gonadotropin dose (IU)
2595.0 ± 802.5
2497.5 ± 885.0
0.354
Total follicles on day of hCG administration
11.7 ± 7.7
11.4 ± 7.5
0.480
COCs
4.9 ± 3.2
9.7 ± 5.6
<0.001
MII oocytes (MII)
4.3 ± 2.8
8.1 ± 4.7
<0.001
Maturation rate (MII/COCs) % per patient
87.1 ± 18.6
84.7 ± 19.5
0.302
2-pronuclei (2PN) oocytes
3.4 ± 2.4
6.2 ± 3.8
<0.001
Fertilization rate (2PN/MII) % per patient
78.1 ± 27.8
76.0 ± 18.6
0.496
Embryo quality on days 2-3 of in vitro culture
Top-quality embryos
2.5 ± 1.9
4.4 ± 3.5
<0.001
Medium-low quality embryos
0.9 ± 1.4
1.9 ± 2.4
<0.001
Cancelled cycles
No MII oocytes, 2PN, or embryos
8 (8.7)
6 (3.3)
0.050
Risk of OHSS (freeze all)
1 (1.1)
1 (0.5)
1.000
Patients with embryo transfer
83 (90.2)
177 (96.2)
0.045
Number of embryos transferred
1.3 ± 0.5
1.3 ± 0.5
0.648
Day of embryo transfer
Days 2-3
71 (85.5)
118 (66.7)
0.001
Day 5
12 (14.5)
59 (33.3)
Proportion of patients with ET of at least one top-quality cleavage stage embryo
56 (78.9)
96 (81.4)
0.677
Proportion of patients with ET of at least one top-quality blastocyst
9 (75.0)
38 (64.4)
0.739
Proportion of patients with excess embryos for freezing
10 (10.9)
31 (16.8)
0.188
Data are presented as mean ± standard deviation or (%). hCG, human chorionic gonadotropin; COCs, cumulus oocyte complexes; MII, metaphase 2; 2PN, 2-pronuclei; OHSS, ovarian hyperstimulation syndrome; ET, embryo transfer; ICSI, intracytoplasmic sperm injection. Boldface data indicates statistical significance ().
