2Ecochard R,Marret H,Rabilloud,et al.Sensitivity and specificity of ultrasound indices of ovulation in spontaneous cycles.Obstet Gynecol Reprod Biol,2000,91:59.
9Fritz MA,Mclachlan RI,Cohen NL, et al . Onset and characteristics of the midcycle surge in bioactive and immunoactive luteinizing periovulatory ovarian steroid hormone secretion[J].J Clin Endocrin Metab , 1992,7 : 489-493.
5Ruder EH, Hartman TJ, et al. Female dietary antioxidant intake and time to pregnancy among couples treated for unexplained infertility[J].Fertility and Sterility, 2014, 101 (3) :759-766.
6Haroun S, Altmae S, et al. The association of trefoil factor 3 gene polymorphisms and haplotypes with unexplained female infertility: molecular insights into TFF3 regulation in receptive phase endometrium[J]. Human Fertility, 2013,16 (4) :291-298.
7Chandra A, Martinez GM. Fertility family planning andreproductive health of U.S. women data from the 2002 National Survey of Family Growth[J].Vital & Health Statistics, 2005, 25 (11): 1-160.
8Sakhavar N. The impact of letrozole versus clomiphene citrate on uterine blood flow in patients with unexplained infertility[J] Journal of Family & Reproductive Health, 2014,8 [J] :1-5.
9Chaudhury K, Chaudhury S, Khastgir G, et al. An effective alternative to only gonadotrophin for controlled ovarian stimulation in unexplained infertility patients undergoing intra-uterine insemination .a clinical trial[J].Iournal of the Indian Medical Association, 2013, III (9) :589-592,594.
10Baumgartner-Parzer S, Vytiska-Binsdorfer E, et al. Unexplained infertility :increased risk for 21-hydroxylase-deficiency in parents and offspring?[J].EuropeanJournal of Obstetrics, Gynecology, and Reproductive Biology, 2014,182 C1 1) :258-259.