Schlagwörter
Female
10
Humans
10
Netherlands
10
Pregnancy
10
Adult
6
Adrenergic beta-Agonists
4
Belgium
4
Cervical Length Measurement
4
Combination
4
Drug Therapy
4
Maternal Age
4
Obstetric Labor
4
Pregnancy Complications
4
Premature
4
Premature Birth
4
Prospective Studies
4
Research Design
4
Tocolytic Agents
4
Administration
2
Analysis of Variance
2
Birth Weight
2
Cervix Uteri
2
Clinical Protocols
2
Cohort Studies
2
Cost-Benefit Analysis
2
Delivery
2
Demography
2
Gestational Age
2
Health Care
2
Incidence
2
Intravaginal
2
Maternal Mortality
2
Multiple
2
Obstetric
2
Outcome Assessment
2
Parity
2
Pessaries
2
Physicians'
2
Postpartum Hemorrhage
2
Practice Patterns
2
Pregnancy Trimester
2
Prenatal Diagnosis
2
Progesterone
2
Registries
2
Risk Factors
2
Second
2
Severity of Illness Index
2
Socioeconomic Factors
2
Treatment Outcome
2
Twins
2