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Clinical study of allylestrenol in the treatment of threatened abortion complicated with subchorionic hematoma in early pregnancy

Clinical study of allylestrenol in the treatment of threatened abortion complicated with subchorionic hematoma in early pregnancy

Status
Active, not recruiting
Phases
Phase 4
Study type
Interventional
Source
ChiCTR
Registry ID
ChiCTR2500107901
Enrollment
Unknown
Registered
2025-08-20
Start date
2025-08-20
Completion date
Unknown
Last updated
2025-08-25

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Threatened abortion complicated with subchorionic hematoma in early pregnancy

Interventions

Experimental Group:Allylestrenol tablets, orally administered, 5 mg per dose, three times daily for 4 weeks.
Control Group:Progesterone capsules, orally administered, 100 mg per dose, twice daily for 4 weeks.

Sponsors

SUN YAT-SEN MEMORIAL HOSPITAL,SUN YAT-SEN UNIVERSITY
Lead Sponsor

Eligibility

Sex/Gender
Female
Age
18 Years to 40 Years

Inclusion criteria

Inclusion criteria: (1) Females aged >= 18 years and <= 40 years; (2) Intrauterine singleton pregnancy at 7–12 weeks of gestation; (3) Diagnosed with threatened miscarriage complicated by subchorionic hematoma (SCH); (4) Signed informed consent form by the patient or their legal guardian.

Exclusion criteria

Exclusion criteria: (1) Multiple pregnancy (twin or higher-order gestation); (2) Ectopic pregnancy; (3) Heavy vaginal bleeding or severe abdominal pain requiring surgical intervention; (4) Chromosomal abnormality in either parent; (5) Concurrent reproductive system malformations, uterine fibroids, or adenomyosis; (6) Current or history of: diabetes mellitus, hypertension, untreated or active cancer, liver disease, kidney disease, neurological disorders requiring medication, uncontrolled hypothyroidism, uncontrolled epilepsy, or psychiatric disorders; (7) Concurrent genitourinary infections (e.g., vaginitis, cervicitis, urinary tract infection); (8) Concomitant autoimmune diseases (including systemic lupus erythematosus, rheumatoid arthritis, antiphospholipid syndrome, etc.); (9) History of =3 consecutive spontaneous abortions; (10) Known allergy to allylestrenol or progesterone; (11) Participation in other clinical trials affecting efficacy evaluation within 30 days prior to enrollment; (12) Investigator’s judgment of unsuitability for the trial.

Design outcomes

Primary

MeasureTime frame
Difference in SCH/Gestational Sac Ratio at 4 Weeks of Treatment versus Baseline;Neonatal outcomes;

Secondary

MeasureTime frame
Pregnancy outcomes (miscarriage, preterm delivery, preterm premature rupture of membranes [PPROM], term delivery, stillbirth, etc.);Mode of delivery (spontaneous vaginal delivery, instrumental vaginal delivery, cesarean delivery);SCH size and SCH/gestational sac ratio at 2, 4, and 8 weeks post-enrollment;Change in SCH/gestational sac ratio from baseline at 2 and 8 weeks post-enrollment; Resolution of clinical symptoms (vaginal bleeding, abdominal pain) and symptom duration at 2 and 4 weeks post-enrollment;Clinical efficacy at 2 and 4 weeks post-enrollment;Pregnancy complications;

Countries

China

Contacts

Public ContactHui Chen

SUN YAT-SEN MEMORIAL HOSPITAL,SUN YAT-SEN UNIVERSITY

zheling76@163.com+86 138 2644 5092

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026