Table 1.
Blood plasma | Epithelial cells | Uterine fluid | ||
---|---|---|---|---|
|
|
|
8 h PO |
18 h PO |
Ions |
[mM] |
[mM] |
[mM] |
[mM] |
Ca2+ |
1.2 |
<0.0002 |
6 |
10 |
Na+ |
140 |
12 |
144 |
80 |
K+ |
4 |
139 |
12 |
60 |
HCO3- |
23 |
12 |
60 |
110 |
pH |
7.4 |
7.0-7.4 |
7.6 |
7.1 |
Cl- | 130 | 4 | 71 | 45 |
The eggshell precursors are secreted in the uterine fluid where the eggshell mineralization daily takes place from 10 hours to 22 hours post ovulation (yolk entry in the oviduct). PO: post ovulation.