Patient and in vitro fertilization (IVF) cycle characteristics associated with variable blastulation rates: a retrospective study from the Duke Fertility Center (2013–2017)

Middle East Fertility Society Journal

Table 5 IVF cycle outcomes by variable blastulation rates

	Low blastulation (< 33%)	Intermediate blastulation (33–66%)	High blastulation (> 66%)	p
Oocytes retrieved	18.05 + 7.9	17.35 + 8.2	13.35 + 4.2	0.0600
Oocytes fertilized*	11.50 + 6.14	10.96 + 4.87	7.91 + 3.4	0.021
Blastulation rate (%)	22.0	48.6	76.5	< 0.0001
Number of blastocysts	2.45 + 1.3	5.39 + 2.9	6.00 + 2.7	< 0.0001
Number of HQB**	0.65 + 0.7	2.47 + 2.2	3.09 + 2.1	0.0002
HQB*** (%)	5.01	21.7	39.4	< 0.0001
CPR**** (%)	53.8	46.7	50.0	0.90

Data are mean + SD or n (%) unless otherwise specified
*2PN or 2 pronuclei (represents the number of viable day 2 embryos)
**HQB, high-quality blastocysts
***The percentage of blastocysts that were deemed high-quality blastocysts by Gardner Criteria
****CPR, clinical pregnancy rate when fresh transfer attempted