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. Author manuscript; available in PMC: 2018 Dec 1.
Published in final edited form as: Hum Fertil (Camb). 2017 Jun 18;21(4):288–293. doi: 10.1080/14647273.2017.1334130

Table 2.

Outcome of non-cancelled first cycle by endometrial thickness measured on day of ovulation trigger.

Positive β-hCG Miscarriagea Live birth



Endometrial
thickness
N Incidence
N (%)
Crude RR
(95% CI)
Adjustedb
RR (95% CI)
Incidence
N (%)
Crude RR
(95% CI)
Adjustedb
RR (95% CI)
Incidence
N (%)
Crude RR
(95% CI)
Adjustedb RR
(95% CI)
≤7 mm 315 103 (32.7) 0.80 (0.68–0.94) 0.74 (0.59–0.94) 38 (12.1) 0.98 (0.72–1.34) 0.96 (0.64–1.45) 62 (19.7) 0.73 (0.58–0.92) 0.64 (0.45–0.90)
>7 to <11 mm 2853 1169 (40.8) REF REF 351 (12.3) REF REF 772 (27.1) REF REF
≥11 mm 3012 1340 (44.5) 1.09 (1.02–1.15) 1.12 (1.04–1.21) 329 (10.9) 0.89 (0.77–1.02) 0.97 (0.81–1.15) 970 (32.2) 1.19 (1.10–1.29) 1.23 (1.11–1.37)

RR: risk ratio; CI: confidence interval.

a

Excludes ectopic pregnancy and therapeutic abortion.

b

Adjusted for age, body mass index, peak progesterone, peak oestradiol, and number of oocytes retrieved.