Table I.

Within-woman comparison of bleed characteristics associated with a pregnancy lost prior to six weeks gestation versus menstrual bleed characteristics following cycles with no detected conception (N = 36 women)

Characteristics of Pad + Tampon Use	Early Loss				No Conception				Early Loss – No Conception
	Mean	SEa	25thb	75thb	Mean	SE	25th	75th	Mean	SE	p-valuec
Length of use (days)	5.8	0.3	5.0	6.8	5.4	0.2	4.9	6.0	0.4	0.2	0.01
Total no. used during bleed period	18.2	1.2	12.5	23.0	18.4	1.3	13.0	24.3	−0.2	0.9	0.94
Max. no. used in one day	5.2	0.4	3.0	6.0	5.4	0.4	3.6	7.3	−0.3	0.3	0.53
Mean no. per bleeding day	3.2	0.2	2.2	4.1	3.5	0.2	2.4	4.4	−0.2	0.1	0.06
Period day of heaviest use	2.3	0.1	1.9	3.0	2.2	0.1	1.8	2.5	0.0	0.1	0.78
No. of light days (0–3)d,e	3.8	0.3	3.0	5.0	3.3	0.3	2.0	5.0	0.5	0.2	0.004
No. of medium days (4–6)	1.6	0.2	0.0	3.0	1.6	0.2	0.8	2.0	0.1	0.2	0.90
No. of heavy days (7+)	0.4	0.1	0.0	0.0	0.6	0.1	0.0	1.0	−0.2	0.1	0.15

^aStandard Error

^b25^th, 75^th percentile values

^cWilcoxon signed rank test

^dNumbers in parentheses indicate daily total for pad + tampon use.

^eOne bleed episode has a single day with pads + tampons = 0.