preterm birth
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: 1.Aged between 18 to 20 years. 2.11-13 weeks of gestation. 3.Single pregnancy and fetal survival. 4.Understand and sign the consent form.
Exclusion criteria
Exclusion criteria: 1.There is no fetal heartbeat during the 11-13 weeks of pregnancy screening. 2.With severe mental disorders and disable to express their will. 3.With other obvious annormal signs,laboratory examination and other clinical diseases, that reseachers think were not suitable for this reasearch. 4.Reseachers were unable to follow up for labour information.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| preterm birth; | — |
Countries
China
Contacts
Tianjin Central Hospital of Gynecology Obstetrics