Table 2.

Comparison of the initial level and rate of increase in serum β-hCG according to pregnancy outcomes between the PGT and non-PGT groups

	Increase rate of β-hCG levels (fold)	PGT group (n = 1698)	Non-PGT group (n = 1830)	P value	Initial β-hCG levels (IU/L)	PGT group (n = 1698)	Non-PGT group (n = 1830)	P value
Biochemical pregnancy loss	Mean ± SD	1.39 ± 1.07	1.60 ± 1.83	0.125	Mean ± SD	66.81 ± 55.92	72.25 ± 50.82	0.041*
Clinical pregnancy loss	Mean ± SD	2.60 ± 1.16	2.59 ± 0.99	0.347	Mean ± SD	137.64 ± 89.08	155.71 ± 98.32	0.040*
Clinical pregnancy	Mean ± SD	2.72 ± 0.82	2.68 ± 0.78	0.354	Mean ± SD	177.34 ± 98.86	184.66 ± 98.04	0.006*
Ongoing pregnancy	Mean ± SD	2.74 ± 0.77	2.64 ± 0.52	0.988	Mean ± SD	182.81 ± 98.50	191.05 ± 96.47	0.002*
Live birth	Mean ± SD	2.73 ± 0.75	2.71 ± 0.73	0.300	Mean ± SD	183.86 ± 99.56	191.52 ± 97.11	0.004*

Initial β-HCG levels were measured on day 9 post-blastocyst transfer

Values are presented as mean ± standard deviation. An asterisk (*) indicates statistical significance at p <0.05