||Chicken Gallus gallus
||Arad Z, Eylath U, Ginsburg M, Eyal-Giladi H. Changes in uterine fluid composition and acid-base status during shell formation in the chicken. Am J Physiol. 1989 Oct257(4 Pt 2):pp. R734.PubMed ID2508495
||Uterine eggs at timed intervals were manually aborted and the accompanying fluid collected and analyzed for composition of osmolytes, enzymes, and acid-base parameters.
||The most prominent phenomenon was the sharp increase in CO2 partial pressure, from 82.2 Torr at 0 h to 132.8 Torr at 10 h. As bicarbonate concentration remained almost stable, fluid pH dropped from 7.412 to 7.250 within this stage.