Study groups *

Group 1

Group 2

Group 3

(n = 21)

(n = 23)

(n = 31)

Character:

Age: (years)

26 ± 4

27 ± 4

27 ± 5

Prior nephrolithiasis: (months)

41 ± 11

41 ± 13

43 ± 12

Duration of conception: (months)

30 ± 4

30 ± 5

30 ± 3

Metabolic changes:

Normal range**

A-Serum:

Parathyroid hormone:

31 ± 6

31 ± 5

39 ± 8

14 - 65

1,25 Vitamin D:

319 ± 43

309 ± 35

166 ± 41

75 - 250

B-24-h urine measurements:

Calcium:

8 ± 0

8 ± 0

7 ± 1

2.5 - 7.5

Phosphorus:

30 ± 3

31 ± 4

31 ± 2

12 - 42

Uric acid:

4 ± 2

4 ± 0

4 ± 1

1.5 - 4.4

Magnesium:

4 ± 0

4 ± 1

4 ± 0

3 - 5

Citrate:

1095 ± 63

1093 ± 61

1068 ± 79

228 - 1191

Oxalate:

0.4 ± 0

0.4 ± 0

0.3 ± 0

0.1 - 0.5

Cystine:

32 ± 8

32 ± 7

35 ± 8

28 - 290