Table 2. PAA (IU/ml) and number of participants in each category.

	Non-Pregnant	9 to 12 Weeks	14 to 23 Weeks	25 to 39 Weeks	First Postnatal Week
Mean Non-Zero PAA	0.325	0.243	0.309	0.348	0.339
SD Non-Zero PAA	0.184	0.129	0.180	0.228	0.217
Maximum Non-Zero PAA	0.785	0.504	0.780	0.809	0.831
Minimum Non-Zero PAA	0.050	0.005	0.076	0.046	0.191
Number (non-Zero PAA)	18	16	25	13	10
Number (zero PAA)	0	3	5	11	0