TABLE 7.

Relative weights of the ovary and oviduct in ducks and chickens together with blood flow [data is shown as mean ± (number of studies) SEM].

Tissue	Ovary	Oviduct	References
Relative weight%
Sexually immature chickens	0.046 ± (4) 0.15a	0.046 ± (2) 0.24a	Maurice et al. (1982); Sun et al. (2006); Martínez et al. (2015); Dunn et al. (2017)
Sexually mature ducks	2.45	2.47	White et al. (1978)
Sexually mature chickens	2.42 ± (13) 0.22b	4.165 ± (7) 0.95b	Brody et al. (1984); Kwakkel et al. (1995); Joseph et al. (2000); Sun et al. (2006); Chen et al. (2007); Emiola et al. (2011); Pishnamazi et al. (2014); Saki et al. (2014); Sun et al. (2015); Hassan et al. (2016); Youssef et al. (2016); Nassar et al. (2017)
Blood flow ml min–1
Sexually mature chickens	5.05 ± (3) 1.12	24.0 ± (6) 4.37	Boelkins et al. (1973); Moynihan and Edwards (1975); Niezgoda et al. (1979); Scanes et al. (1982); Hrabia et al. (2005); Rząsa et al. (2008)

^a,bDifferent superscript letters indicates difference p < 0.05.