Table 4.

Comparison of features related to oocytes and embryos between the ROPA and the non-ROPA groups

	ROPA	Non-ROPA	p
Oocytes and Embryos
Number of oocytes retrieved	12.4 (7.9)	10.3 (7.0)	< 0.01
Number of mature oocytes obtained	10.1 (6.4)	7.7 (5.6)	< 0.01
Number of embryos classified as A	0.59 (1.2)	0.44 (1.1)	0.03
Number of embryos classified as B	1.47 (2.3)	0.81 (1.5)	< 0.01
Number of viable embryos	2.84 (3.8)	1.76 (2.6)	0.02
Frozen embryo transfers
Type of cycle
Natural	19.7%	17.3%	0.17
Hormonal replacement	80.3%	79.5%	0.36
Ovarian stimulation	0%	3.2%	0.10
Endometrial thickness (last measurement in follicular phase)	9.1 (1.6)	9.1 (3.1)	> 0.99
Estradiol levels (last measurement in follicular phase)	1180 (1918)	963 (1405)	0.56