Preterm Contractions Checklist
1. Is the gestational age less than 37 weeks?
<-- Are dates certain?
<-- Established by LMP or early ultrasound?

2. Are the membranes ruptured?
<-- History of leaking fluid?
<-- Positive nitrazine test result?
<-- Ferning of fluid on microscopy?
<-- Positive amniotic protein test result?
<-- Ultrasound assessment shows low amniotic fluid?
<-- Ultrasound-guided transabdominal instillation of indigo carmine dye into the amniotic sac, if available, shows dye outside the amniotic sac?

3. Is the patient in labor?
<-- Regular contractions
<-- Progressive dilation and cervical effacement?

4. Is there an infection?
<-- Group B streptococcus carrier status?
<-- Urinary tract infection?
<-- Bacterial vaginosis?
<-- Trichomoniasis?
<-- Gonorrhea?
<-- Chlamydia?

5. What is the likelihood that the patient will deliver prematurely?
<-- Fetal fibronectin test negative?
<-- Cervical length of at least 3 cm on ultrasonagraphy?

display/hide references
Reference:
#1 Sayres WG Jr. Preterm labor. Am Fam Physician. 2010 Feb 15;81(4):477-84.

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