Table 2.

Duration (weeks) of pregnancies previous to and subsequent from proband by gender, history of spontaneous abortion

	Male proband		Female proband
	N	Mean	N	Mean	p value
All mothers
Previous pregnancy	69	36.9	100	33.5	n.s.
Subsequent pregnancy	46	38.6	58	34.6	0.029
Mothers with history
Previous pregnancy	14	27.9	33	20.9	n.s.
Subsequent pregnancy	8	32.8	19	24.5	n.s.
Mothers with no history
Previous pregnancy	55	39.2	67	39.6	n.s.
Subsequent pregnancy	38	39.9	39	39.6	n.s.