Please select the eligibility criteria that correspond to the clinical trial below.
Title: Effects of Antenatal Corticosteroid in Twin Neonates With Late Preterm Birth: Study Protocol for a Randomized Controlled Trial
Brief Summary: This study will be the first study that evaluates the effectiveness of antenatal corticosteroid (ACS) in late preterm twin neonates.


Options:
A: Inclusion Criteria:

* (1) Age over 18 years
* (2) Twin pregnant women at 34weeks 0days to 36weeks 5days of gestation
* (3) At risk for preterm birth such as preterm labor, preterm prematrue rupture of membrane or maternal-fetal indications that need preterm delivery. Preterm labor is defined as regular uterine contractions with or without the following symptoms; pelvic pressure, backache, increased vaginal discharge, menstrual-like cramps, bleeding/show, cervical changes
* (4) Availability of written informed consent.

Exclusion Criteria:

* (1) Gestational age before 34weeks 0days or after 36weeks 6days
* (2) Lethal major fetal anomaly, fetal distress or fetal death in utero
* (3) Expected to deliver within 12 hours; for example, advanced cervical dilatation (\>8cm) in preterm labor or active phase labor (cervical dilatation\>4cm) in preterm premature rupture of membranes
* (4) History of a previous administration of ACS before 34weeks of gestation for fetal lung maturation
* (5) Administration of systemic steroid for medical indications
* (6)Diagnosis of clinical chorioamnionitis Fever \>37.8 and the presence of two more following conditions: uterine tenderness, foul-odored vaginal discharge, maternal leukocytosis(\>1500), maternal tachycardia(\>100) or fetal tachycardia(\>160)
B: Inclusion Criteria:

* All infants born at the units belonging to the South American Neocosur Network with a birthweight between 800 to 1500g and breathing spontaneously at birth or after hand bagging with Neopuff or transient intubation are eligible.
* An informed consent form should be obtained preferable prenatal.

Exclusion Criteria:

* Acute life threatening congenital malformations or genetics diseases.
* Apgar score equal or less than 3 at 5 minutes
* Disapproval of informed consent.
C: Inclusion Criteria:

Infants likely to be delivered to women presenting to a participating Vermont Oxford Network Center at high risk of premature delivery at gestational age 26 + 0 to 29 + 6 weeks will be eligible for inclusion. Specific inclusion criteria that must be met prior to randomization include:

1. Imminent delivery
2. No potentially life-threatening congenital anomaly or genetic syndrome
3. No known lung maturity
4. Antenatal steroid status known
5. Written, informed consent obtained (on admission or prior to delivery).

Exclusion Criteria:

1. Stillborn (Apgar score of 0 at one minute of age)
2. Noted to have a potentially life-threatening congenital anomaly or genetic syndrome noted immediately after delivery.
D: This is an intent-to-treat design and thus all pregnancy outcomes of women who deliver in the study clusters and provide consent will be collected. Cluster-level inclusion criteria include

* At least 250 deliveries per year.
* Birth attendants within the health cluster will be consented to participate

Participant-level inclusion criteria include all pregnant women living in and delivering in the study cluster who:

* Are between 24 and 36 weeks GA;
* Present with signs of preterm labor, amniotic fluid leakage, hemorrhage, or hypertension;
* Provide consent for injection or present to a facility where it is standard of care.

Exclusion Criteria:

* There will not be any specific exclusion criteria for clusters or participants.

Answer: A