Table 4.

Comparison of effectiveness of oocyte recovery using the ovum pick-up method in ewes.

Method	Method Effectiveness (%)	Oocytes Qualified for in Vitro Maturation *	Author/Date
L-OPU	79.5	60	Baldassarre 1996 [19]
	77.3	57
L-OPU	67.9	83	Kühholzer 1997 [26]
L-OPU	55.5	65–70	Stangl 1999 [14]
L-OPU	56.2	85.7	Morton 2005 [43]
	38.8	81.8
L-OPU	28.3–69.5		Rodríguez 2006 [20]
L-OPU	85.6		Cox 2007 [17]
L-OPU	51.7		Teixeira 2011[28]
L-OPU **	63.8	86.1	Wieczorek 2018 [13]

* in relation to the number of recovered oocytes (%), ** L-OPU—laparoscopic ovum pick-up.