Table 4.
Pregnancy outcomes of the first FET cycle according to the AMH level.
| AMH quartiles (ng/mL) | P-value | ||||
|---|---|---|---|---|---|
| ≤1.43 | 1.44–2.55 | 2.56–4.35 | >4.35 | ||
| No. of patients | 79 | 79 | 78 | 78 | |
| No. of viable embryos per patient | 2 (1–3) | 3 (2–4) | 4 (3–6) | 4 (3–8) | <0.001 |
| AMH (ng/mL) | 0.79 (0.46–1.04) | 2.01 (1.68–2.23) | 3.28 (2.92–3.83) | 6.31 (5.19–7.72) | <0.001 |
| Demographics | |||||
| Age (years) | 37.0 (33.0–40.0) | 34.0 (30.0–38.0) | 33.0 (29.0–37.0) | 31.0 (28.0–34.3) | <0.001 |
| BMI (kg/m2) | 21.0 (19.5–23.4) | 20.8 (19.5–23.1) | 21.0 (19.4–23.0) | 21.9 (20.1–23.8) | 0.634 |
| FET characteristics | |||||
| Total No. of transferred embryos | 122 | 142 | 145 | 143 | |
| Single embryo transfer, n (%) | 36 (45.6) | 16 (20.3) | 11 (14.1) | 13 (16.7) | <0.001 |
| Double embryo transfer, n (%) | 43 (54.4) | 63 (79.7) | 67 (85.9) | 65 (83.3) | |
| Endometrial preparation | |||||
| Natural cycle, n (%) | 17 (21.5) | 15 (19.0) | 17 (21.8) | 8 (10.3) | 0.016 |
| HRT, n (%) | 24 (30.4) | 16 (20.3) | 9 (11.5) | 13 (16.7) | |
| Mild stimulation, n (%) | 38 (48.1) | 48 (60.8) | 52 (66.7) | 57 (73.1) | |
| Endometrial thickness (mm) | 9.8 (8.5–11.3) | 9.5 (8.3–11.3) | 10.1 (8.4–11.2) | 10.6 (9.5–12.5) | 0.096 |
| Pregnancy outcome, n/N (%) | |||||
| Biochemical pregnancy rate | 30/79 (38.0) | 40/79 (56.0) | 45/78 (57.7) | 35/78 (44.9) | 0.084 |
| Clinical pregnancy rate | 27/79 (34.2) | 39/79 (49.4) | 38/78 (48.7) | 31/78 (39.7) | 0.158 |
| Implantation rate | 34/122 (27.9) | 48/142 (33.8) | 54/145 (37.2) | 37/143 (25.9) | 0.144 |
| Early miscarriage rate | 5/27 (18.5) | 5/39 (12.8) | 2/38 (5.3) | 5/31 (16.1) | 0.346 |
| Multiple pregnancy rate | 7/27 (25.9) | 7/39 (17.9) | 15/38 (39.5) | 6/31 (19.4) | 0.132 |
| Ectopic pregnancy rate | 0/27 (0.0) | 2/39 (5.1) | 0/38 (0.0) | 2/31 (6.5) | 0.278 |
Data are presented as median (interquartile range) for all continuous variables.