Research Article
The Feasibility of Choosing D4 Embryo Transfer—Analysis of Nanomaterials Affecting the Outcome of Frozen-Thaw Embryo Transfer
Table 2
Analysis of single factors affecting the pregnancy outcome of frozen-thaw embryo transfer cycle.
| | | No pregnancy | Pregnancy | t/x2 | P |
| | Age | | ± s | 33.80 ± 4.35 | 32.50 ± 3.86 | 8.48 | | | ≤35 | 890 (67.58) | 1264 (78.61) | 45.37 | | | >35 | 427 (32.42) | 344 (21.39) | | |
| | Endometrial thickness (cm) | | ± s | 0.96 ± 0.22 | 0.93 ± 0.2 | −4.80 | | | ≤0.8 | 372 (28.25) | 316 (19.65) | 31.65 | | | 0.81∼1.0 | 543 (41.23) | 704 (43.78) | | >1.0 | 402 (30.52) | 588 (36.57) |
| | BMI (kg/m2) | | ± s | 23.22 ± 3.61 | 23.61 ± 3.76 | −2.83 | | | ≤18.5 | 84 (6.38) | 91 (5.7) | 10.18 | | | 18.6∼23.9 | 744 (56.49) | 829 (51.55) | | 24∼26.9 | 282 (21.40) | 387 (24.1) | | 27∼29.9 | 132 (10.00) | 199 (12.4) | | >30 | 75 (5.70) | 102 (6.3) |
| | Number of embryos transferred | | 1 | 369 (28.02) | 357 (22.20) | 13.13 | | | 2 | 948 (71.98) | 1251 (77.80) | | |
| | Day of embryo transferred | | D3 | 616 (46.77) | 618 (38.43) | 44.25 | | | D4 | 19 (1.44) | 34 (2.11) | | D5 | 254 (19.29) | 471 (29.29) | | D6 | 428 (32.50) | 485 (30.16) |
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