Table 3.

Pairwise comparison of placental MDA levels.

	First trimester	Second trimester	Third trimester
	Test Score, P value	Test Score, P value	Test score, P value
First trimester	—	1885.0, 0.01	1731.0, 0.003
Second trimester		—	1106.0, 0.87
Third trimester			—

MDA: malondialdehyde; the nonparametric Mann-Whitney U test was applied.

Significant differences were noted between first and second trimester (P < 0.01) and first and third trimester (P < 0.003) groups. The difference in MDA levels between second and third trimester groups was not significant.