Correlations in the pathogenesis by early pregnancy loss
Authors:   I.M.Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation, Kagramanova Zh.A. , Lanshchakova P.E. ,   I.M.Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation, Malinovskaya V.V. ,   National Research Center for Epidemiology and Microbiology named after the honorary academician N.F.Gamaleya, Moscow, Russian Federation, Svistunov A.A. ,   I.M.Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation, Vizhlova E.N. ,   National Research Center for Epidemiology and Microbiology named after the honorary academician N.F.Gamaleya, Moscow, Russian Federation
Published: October 2021

Objective. To improve the quality of life and outcome by consecutive pregnancy in patients based on the analysis of correlations and differences in markers for the diagnosis by early pregnancy loss (EPL) in early gestation period (up to 12 weeks). Patients and methods. 100 patients aged 18 to 40 years diagnosed with early pregnancy loss (EPL) at 7–8 and 9–10 weeks of obstetric term were examined. The types of EPL were identified by ultrasound criteria; correlations and differences in the EPL mechanism during early pregnancy were determined. Time characteristics of the gestational sac (GS) development from conception to miscarriage and the duration of persistence of an empty sac in the uterine cavity before the diagnosis of EPL were recorded. Molecular genetic testing of the chorion in 42 women with EPL was performed by multi-locus quantitative fluorescent polymerase chain reaction (PCR). The method of manual vacuum aspiration under the control of hysteroscopy was developed, followed by the administration of antibacterial, antiviral, and immunomodulatory therapy with Viferon® rectal suppositories at a dose of 1,000,000 IU 1 suppository twice a day at 12-hour intervals for 10 days and Viferon® gel 36,000 IU on the vaginal region of the cervix at a dose of 2 mL twice a day for 7 days. Results. The period of hospital admission for patients with embryonic miscarriage (EM) as the type of EPL prevailed between 8 and 10 weeks, on the average – 9.5 weeks of obstetric term, in contrast to empty sac (ES, 7–8 weeks). The period of the GS development in ES ranged from 17 to 36 days (2.3 to 5.1 weeks); in EM – 4 to 9 weeks (26 to 69 days) in 96% of patients, and the embryo development was from 3–4 to 6–7 weeks from conception (21 to 49 days). There was a 1.2-week difference in the desynchronization of the development of GS and an embryo. A significant positive correlation between gestational age (before diagnosis) and β-hCG levels (26,348 ± 18,289 mIU/mL) in patients without bloody discharge at the time of hospitalization was observed. However, there was a desynchronization of lag in β-hCG levels by an average of 3 times (8661 ± 7701 mIU/mL) in the presence of bloody discharge, although the sizes of GS according to mean sac diameter (MSD) were comparable (28 ± 13 mm and 30 ± 11 mm). There was a complete lack of synchronization of the abnormal development of GS, an embryo, β-hCG levels, and the duration of GS persistence in the uterine cavity after miscarriage. The following correlations occurred in the pathogenesis of EPL: chromosomal abnormalities (45% in EM and 40% in ES), history of gynecological and viral diseases (49% in EM and 41% in ES). Correlational differences in the developmental period of GS according to MSD, an embryo, the period of persistence in the uterine cavity after miscarriage, the uterine size, and mean β-hCG levels (at week 8-10) in EM were at different gestation periods before the onset of manifestation of miscarriage. Conclusion. Determination of correlation dependencies and differences in the results of monitoring diagnostic markers of different types of EPL makes it possible to develop a personalized approach to the choice of gestational sac aspiration, antibacterial, antiviral, and immunomodulatory therapy with Viferon® (interferon α-2b with antioxidant complex) for a successful consecutive pregnancy and its outcome. Key words: anembryonic pregnancy, embryonic miscarriage, correlations, pathogenesis by early pregnancy loss, early pregnancy loss, persistence of empty sac, β-hCG