Endometrial receptivity and conception outcome among women with light menstrual bleeding of unidentified etiology

Yueqing Gao, Xiangli Hong, Zhewei Wang, Ying Zhu
International Journal of Gynecology & Obstetrics · 2017 · vol. 140(1) , pp. 37–41 · doi:10.1002/ijgo.12335 · PMID:28963800 · W2759144114
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Women with light menstrual bleeding of unknown cause exhibited lower endometrial receptivity, a reduced conception rate, and a higher early spontaneous abortion rate compared to controls.

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Abstract

OBJECTIVE: To investigate endometrial receptivity (ER), conception outcome, and other factors among women with light menstrual bleeding of unidentified etiology. METHODS: A prospective study was undertaken at a center in China. Between January 1, 2011, and December 31, 2014, women meeting the inclusion criteria (aged 20-35 years, without any history of pregnancy, desire to conceive, follicle-stimulating hormone <10 IU on second or third day of cycle, and regular menstrual periods) were enrolled. Participants with a menstrual blood volume of 5-20 mL 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-luteal phase. Participants were followed up for 1 year to establish conception outcome. RESULTS: The ER (Salle) score was significantly lower in the study group (n=110) than in the control group (n=330; 9.41 ± 3.02 vs 15.67 ± 2.63, P<0.001). The natural rate of conception within 1 year was lower (60.0% [63/105] vs 72.1% [230/319], P=0.020), and the spontaneous abortion rate in early pregnancy was higher (34.4% [21/61] vs 18.1% [41/227], P=0.006) in the study group than in the control group. CONCLUSION: Women with light menstrual bleeding of unidentified etiology had an increased prevalence of low ER and poor conception outcome.

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MeSH descriptors

Fertilization Menstruation Menstruation Disturbances Adult China Endometrium Endometrium Female Follicle Stimulating Hormone Follicle Stimulating Hormone Humans Luteal Phase Luteal Phase Menstruation Menstruation Disturbances Menstruation Disturbances Menstruation Disturbances Pregnancy Prospective Studies Young Adult

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