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Table 1 Characteristics of patients grouped according to the presence of ongoing pregnancy

From: Measuring the serum progesterone level on the day of transfer can be an additional tool to maximize ongoing pregnancies in single euploid frozen blastocyst transfers

VariableOngoing pregnancy (n = 99)Non-ongoing pregnancy (n = 69)p-value
Female age (years)33 (23–44)33 (26–42)0.555
BMI (kg/m2)23.9 (17.9–33.2)24.6 (18.4–33.5)0.683
Sperm concentration (million sperm/ml)22 (0.4–75)20 (0.1–60)0.911
No. of oocytes retrieved10 (3–35)11 (1–40)0.896
No. of MII oocytes8 (2–28)10 (1–33)0.282
Fertilization rate (%)87.5 (45.45–100)83.3 (57.14–100)0.318
E2 levels on P administration day (pg/ml)260 (115–551)286 (119–2018)0.295
P levels on P administration day (ng/ml)0.08 (0.05–0.90)0.05 (0.01–0,.86)0.332
Endometrial thickness (mm)9 (7–12.3)9,1 (7,.5–14)0.494
P levels on the day of ET (ng/ml)28 (5.6–76.4)16.4 (7.4–60)0.039*
No. of miscarriages0 (0–4)0 (0–5)0.945
No. of previous live births0 (0–1)0 (0–1)0.337
Trophectoderm Score
 A (%/n)14.1 (14)24.6 (17)0.209
 B (%/n)34.3 (34)27.5 (19) 
 C (%/n)51.5 (51)47.8 (33) 
ICM Score
 A (%/n)27.3 (27)31.9 (22)0.642
 B (%/n)63.6 (63)56.5 (39) 
 C (%/n)9.1 (9)11.6 (8) 
  1. *statistically significant difference; p < 0.05
  2. Values are given as the median (minimum-maximum) or number (percentage)
  3. BMI, M2, 2PN, E2, and P denote body mass index, mature oocyte, 2 pronuclei, oestradiol, and progesterone, respectively
  4. p-values were calculated with a Chi-square test and a non-parametric independent samples median test