Table 3 Comparison between the pregnancy groupand the nonpregnancy group
|  | Nonpregnant group (n = 297) | Pregnant group (n = 221) | Z | P |
|---|---|---|---|---|
AMH | 3.630 (1.940–6.110) | 3.750 (1.960–5.885) | − 0.166 | 0.868 |
The total Gn (bottle) | 36 (25–46) | 36 (27–44) | − 0.379 | 0.705 |
Start Gn (IU) | 225 (150–300) | 225 (187.5–300) | − 2.073 | 0.038 |
The total days of Gn | 11 (10–12) | 11 (10–12) | − 0.497 | 0.619 |
Number of oocytes obtained | 10 (7–13) | 10 (7–13) | − 0.359 | 0.720 |
The number of MII | 9 (6–12) | 9 (6–12) | − 0.534 | 0.593 |
The number of cleavages | 7 (5–11) | 8 (5–11) | − 0.300 | 0.764 |
The number of 2PN | 6 (4–8) | 6 (4–8.5) | − 0.389 | 0.697 |
The number of high quality embryos | 4 (2–6) | 4 (2–6) | − 1.015 | 0.310 |