Factor

Odds ratio

C.I. 95% of OR

P value

Miscarriage

0.333

0.084 - 1.322

0.118

Artificial abortion

1.972

0.677 - 5.749

0.213

Pelvic Adhesions

3.716

1.575 - 8.767

0.003

POR in the past

0.524

0.318 - 0.863

0.011

Age 20 - 34

0.499

0.247 - 1.008

0.053

Age 35 - 39

0.079

0.017 - 0.360

0.001

Age 40 - 47

0.181

0.041 - 0.809

0.025