Effect of progesterone timing on live birth rates in day-6 blastocyst frozen-thawed embryo transfer cycles: a randomized controlled trial.

In contrast, among late blastocyst transfers, the LBR tended to be higher in the day-7 group (46.8% vs 31.7%; absolute difference, 15.0% [95% CI, −1.9% to 32.0%]; adjusted RR, 1.47 [95% CI, 0.95–2.28], P = 0.082), although this difference did not reach statistical significance.

also in 111,027 other papers