Table 1. General characteristics of the normal pregnant group, the PL group, the non-gravid group 1 and the non-gravid group 2.

Characteristic	Normal pregnancy		PL		Non-gravid 1		Non-gravid 2
	%	Mean	%	Mean	%	Mean	%	Mean
Age, yearsa		28.33		28.53		28.90		28.47
Employment statusb
Employed full-time	83.33		90		86.67		83.33
Homemaker	16.67		10		13.33		16.67
Menstrual cyclec
Regular	93.33		80		93.33		93.33
Unregular	6.67		20		6.67		6.67
Body Mass Indexd		21.69		21.51		21.58		21.55
Gestational age, daye		53.1		52.3
Seasonf
Winter	26.67		26.67		13.33		13.33
Autumn or spring	73.33		73.33		85.67		86.67

Abbreviation: PL, pregnancy loss.

^af=0.181, P=0.909.

^bχ²=0.754, P=0.860.

^cχ²=4.444, P=0.217.

^df=0.152, P=0.928.

^et=0.707, P=0.482.

^fχ²=3.333, P=0.343.