Preterm Labor Flashcards
Normal Term delivery weeks
37-42 weeks
Preterm labor seen if less than how many weeks
Less than 37 weeks
Late preterm labor termed if delivery in
34-36 weeks (+6days)
Usual preterm labor seen in week
32-34 weeks
Early preterm labor week
Less than 32 weeks
Post term delivery
If More than 42 weeks
Post term delivery
If More than 42 weeks
Preterm labor is present if contractions per hours is
4 times/20 min. Or >8 times in 1 hour
In preterm labor, On pervaginal exam cervix is
> 1cm dilated or >80% effaced
Definitive diagnosis of preterm labor if cervix is
<3cm dilated or <80% effaced - Early preterm labor
Incidence of Preterm labor in percentage
10% (6-15%)
Most common cause of Preterm labor
Infections - UTI Or PID
Causative organisms in Infections responsible for Preterm labor
Chlamydia
Gonorrhea
Mycoplasma
Bacteroides
Streptococci
B. Vaginosis
Diagnosis of Chorioamnionitis confirmed if
Increase in Leukocytes count (15000)
Increased pulse rate
Foul smelling vaginal discharge
CRP >2.7mg/dL
If >2 points positive - Diagnosis of infection
Other causes of Preterm labor than infection
1) Anomalies - Uterine anomalies -Septate, Bicornate uterus, Unicornate uterus
Cervical - lacerated cervix , Short cervix
2) Maternal fetal stress
3) Choriodecidual space bleeding
4) Uterine overdistension - Polyhydroamnios, Large baby, Multiple (Twins, Triplets)
Prediction of Preterm Labor by USG can be done in which weeks
1) 12-13 weeks
If <2.5cm Cervical length - incompetent os
2) 29 week onwards - Funneling of cervix
Prediction of Preterm Labor by USG can be done in which weeks
1) 12-13 weeks
If <2.5cm Cervical length - incompetent os
2) 29 week onwards - Funneling of cervix
Fetal fibronectin can be seen normally in which weeks
Before 22 weeks and
After 37 weeks
Fetal fibronectin seen abnormally in which weeks
In between 22 weeks nd 37 weeks.
Fetal fibronectin seen in between 22 and 37 weeks predicts how much chances of Preterm labor
30% chances increase in PTL in 1 week
40% PTL in 2 weeks
Neonatal problems seen in Preterm labor
Respiratory distress syndrome
Bronchopulmonary dysplasia
Necrotising enterocolitis
Intraventricular hemorrhage
Neonatal death
Maternal problems seen in Preterm labor
PID (Endometritis)
Puerperal sepsis
Maternal problems seen in Preterm labor
PID (Endometritis)
Puerperal sepsis
Management given in Case of Preterm labor
Steroids given to mother - Fetus
Dexamethasone
Betamethasone
