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Int Urol Nephrol. 2009 Dec;41(4):927-32. doi: 10.1007/s11255-009-9586-1. Epub 2009 Jul 4.

Does glomerular hyperfiltration in pregnancy damage the kidney in women with more parities?

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Department of Obstetrics and Gynecology, Fatih University School of Medicine, Ankara, Turkey.



We aimed to investigate the glomerular hyperfiltration due to pregnancy in women with more parities.


Five hundred women aged 52.57 +/- 8.08 years, without a history of hypertension, diabetes mellitus or complicated pregnancy were involved in the study. They were divided into three groups. Group 1: women with no or one parity (n = 76); group 2: women with two or three parities (n = 333); group 3: women with four or more parities (n = 91). Laboratory parameters and demographical data were compared between the three groups.


Mean age, serum urea and serum creatinine were similar between three groups. Patients in group 3 had significantly higher GFR values compared to groups 1 and 2 (109.44 +/- 30.99, 110.76 +/- 30.22 and 121.92 +/- 34.73 mL/min/1.73 m(2) for groups 1, 2 and 3, respectively; P = 0.008 for group 1 vs group 3; P = 0.002 for group 2 vs group 3).


In our study, we suggest that glomerular hyperfiltration due to pregnancy does not have adverse effects on kidney in women with more parities. Pregnancy may have possible protective mechanisms for kidney against adverse effects of glomerular hyperfiltration.

[Indexed for MEDLINE]

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