TY - JOUR AU - van der Steeg, J W; Steures, P; Eijkemans, M J; CECERM Study Group (Collaborative Effort for Clinical Evaluation in Reproductive Medicine) TI - Pregnancy is predictable: a large-scale prospective external validation of the prediction of spontaneous pregnancy in subfertile couples JO - Hum Reprod IS - 02 VL - 22 PY - 2007 DO - 10.1093/humrep/del378 L3 - PubMed-ID: 16997935 SP - 536 EP - 542 ER -