Table 1.
Pregnancy outcome of chlormadinone acetate compared to vaginal progesterone
|
Vaginal progesterone (January 2006‐May 2007) |
Chlormadinone acetate (July 2007‐December 2015) |
P valued | |
|---|---|---|---|
| Number of embryo transfer cycles | 831 | 13 381 | ‐ |
| Mean age at embryo transfer (y) | 34.4 | 36.9 | P < 0.001e |
| Mean number of embryos transferred per cycle | 2.2 | 1.4 | P < 0.001e |
| Number of cycles of clinical pregnancies | 259 | 4228 | 0.7959f |
| (clinical pregnancy ratea) | (31.2%) | (31.6%) | |
| Number of cycles resulting in abortions | 71 | 1320 | 0.1984f |
| (abortion rateb) | (27.4%) | (31.2%) | |
| Number of cycles resulting in births | 188 | 2908 | |
| (birth ratec) | (72.6%) | (68.8%) |
a
Clinical pregnancy rate (%) = Number of clinical pregnancies/Number of embryo transfer cycles × 100.
b
Abortion rate (%) = Number of cycles resulting in abortions/Number of cycles of clinical pregnancies × 100 (“Abortion” is defined as a miscarriage occurred before 22 weeks of pregnancy).
c
Birth rate (%) = Number of cycles resulting in births/Number of cycles of clinical pregnancies × 100.
d
P values were determined by Mann‐Whitney U test (e) or chi‐square test (f).