Post Graduation Program in Health Sciences: Gynecology and Obstetrics;
Faculdade de Medicina da Universidade Federal do Rio Grande do Sul (UFRGS);
RS;
Brazil;
Service of Gynecology and Obstetrics;
Hospital Moinhos de Vento;
Porto Alegre;
Porto Alegre;
RS;
Brazil;
Ecofetal-Ultrasound Clinic;
Porto Alegre;
RS;
Brazil;
Pediatrics Service of Moinhos de Vento Hospital;
Porto Alegre;
RS;
Brazil;
Service of Gynecology and Obstetrics;
Hospital de Clinicas de Porto Alegre;
Porto Alegre;
Porto Alegre;
RS;
Brazil;
Preterm Birth; Screening; Cervical Length Measurement; Preterm Birth Prevention Clinic;