{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,23]],"date-time":"2026-04-23T15:52:57Z","timestamp":1776959577115,"version":"3.51.4"},"reference-count":25,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2017,10,23]],"date-time":"2017-10-23T00:00:00Z","timestamp":1508716800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Intl J Gynecology &amp; Obste"],"published-print":{"date-parts":[[2018,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>To investigate endometrial receptivity (ER), conception outcome, and other factors among women with light menstrual bleeding of unidentified etiology.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A prospective study was undertaken at a center in China. Between January 1, 2011, and December 31, 2014, women meeting the inclusion criteria (aged 20\u201335\u00a0years, without any history of pregnancy, desire to conceive, follicle\u2010stimulating hormone &lt;10\u00a0IU on second or third day of cycle, and regular menstrual periods) were enrolled. Participants with a menstrual blood volume of 5\u201320\u00a0mL formed the study group; others were in the control group. ER measures were obtained by transvaginal Doppler ultrasonography. Serum estradiol and progesterone levels were measured and items of prethrombotic state were screened in mid\u2010luteal phase. Participants were followed up for 1\u00a0year to establish conception outcome.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The ER (Salle) score was significantly lower in the study group (n=110) than in the control group (n=330; 9.41\u00a0\u00b1\u00a03.02 vs 15.67\u00a0\u00b1\u00a02.63, <jats:italic>P&lt;<\/jats:italic>0.001). The natural rate of conception within 1\u00a0year was lower (60.0% [63\/105] vs 72.1% [230\/319], <jats:italic>P=<\/jats:italic>0.020), and the spontaneous abortion rate in early pregnancy was higher (34.4% [21\/61] vs 18.1% [41\/227], <jats:italic>P=<\/jats:italic>0.006) in the study group than in the control group.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Women with light menstrual bleeding of unidentified etiology had an increased prevalence of low ER and poor conception outcome.<\/jats:p><\/jats:sec>","DOI":"10.1002\/ijgo.12335","type":"journal-article","created":{"date-parts":[[2017,9,30]],"date-time":"2017-09-30T11:22:38Z","timestamp":1506770558000},"page":"37-41","source":"Crossref","is-referenced-by-count":6,"title":["Endometrial receptivity and conception outcome among women with light menstrual bleeding of unidentified 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